Chevrolet - Suburban :: 1994 - Slower When Accelerating Cold Or Warm / Power Loss
Dec 19, 2015
I have a 94 Chevy Suburban C1500 with a 5.7L, 350 Engine. It has 235,000 miles on it. I purchased it about 4 years ago with 191,000 miles in very good condition and obviously well maintained. I have continued to maintain it well.
For the past few months it has begun to start a little slower that before and when accelerating cold or warm there is a spot where it looses power. It doesn't sputter or die it just looses power. I can press the accelerator farther and it will come back to life and do fine. After a 20 -30 minute drive if I park for a while, 20 - 30 minutes, when I start it up it dies. The only way to keep it running is to give it the gas and smooth it out at about 1500 rpm for 10 - 15 seconds. Then I can drive it with no problem most of the time though it still has the dead spot on acceleration.
There is a good spray pattern from the throttle body injectors. Plugs and wires are relatively new and plugs look good (AC Delco Rapidfire Platinum). When I turn on the ignition without going to start, the fuel pump builds pressure for 4 - 6 seconds. I haven't checked the fuel pressure yet and am considering investing in the rig to do so. I recently replaced the fuel filter but that didn't work.
The check engine light has not come on but many of the lights in the cluster are burned out and I haven't felt like going to the trouble to fix that so it is possible that the check engine bulb is bad.
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1994 Grand Cherokee Laredo, 100,000 miles:
Driving out to see my BF this afternoon I noticed when I accelerated it hesitated a bit. I didn't think anything of it so I let it go. Driving home was another story. I was about 5 miles from home coming up to a red light and I started to brake, the light turned green and I hit the accelerator and I got no juice, I got across the highway and started to brake and the brakes locked up, the steering wheel locked up and then I lost all power. I got the Jeep to stop (right at the exit to a train station ) I tried to turn it back on and got no juice. I just got a new battery about 3 weeks ago. I called 911 since I was stuck in the middle of the road right outside the railroad station. Officer asked me to try to crank the engine again, asked if I had gas (have 1/2 tank) and then got me pushed into a spot until I can get a tow to my house in the morning.
The car has been fine, I never put "off" gas in, try not to let the gas get below half a tank.
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2002 Chevy Monte Carlo SS 6cyl 100,000 miles
Symptom, loss of horse power (from a stop and going uphill), surge or lunge forward when accelerating (misfire?), rough idle (occasional knock). Maintenance, regularly change all filters and fluids, recently had the m.a.f cleaned and changed air filter, spark plugs and wires, oil.
There have been times in the past year or so when the car would crank but not start. Especially when the car was hot. Wait a couple minutes and it would start. Also a couple of times the car would shake fairly hard when started, get up to speed and it was fine.
I have had people tell me anything from a clogged catalytic converter to bad fuel injectors or fuel pump.
Scanned the car last week. No codes showed up. Never had a Check Engine Light.
I forgot to mention that every once and a while the car will jerk when accelerating. I have a coworker who said his truck started to jerk forward and later would not start at all. Our mechanic said it was the fuel pump. I I will see what that does for him.
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I have a 94 C2500 suburban with a TBI 454BB. Obviously, I'm not concerned with fuel mileage, but I am currently getting about 4 miles to the gallon because the idle is stuck at 1800RPM. Normal idle for my model according to the index book is 750RPM. it's usually pretty close to that when operating normally (+/-25RPM). 3 days ago I did my biannual throttle body cleaning. Took it completely off replaced the gasket cleaned the throttle body and put it all back together. This is when the problem started... It now idles at 2300 RPM, it threw the code for bad idle air control valve, and I figured I probably got the plug wet when cleaning the throttle body, so I went ahead and ate the 60 bucks and replaced it.
Went through the reset process for the ECM to learn the new one and it the idle has come down to 1800RPM, it also literally DUMPING fuel through the injectors into the top of the throttle body. While I don't believe it is actually running rich, it seems more like the idle is trying to compensate for the excess fuel that is being dumped into the top end. Now, Before I go any further I want someone else's input. "I" think it is a also a bad throttle position sensor that probably got wet when cleaning the TB. But I am worried it could also be the PCM has finally gone out, although this is probably not likely because the entire ignition is run by this and if it was bad, it would stand to reason that it wouldn't run at all. Or it could be a bad vacuums control module. I have checked all my vacuum lines and do not have any leaks, so I know that isn't the problem. So that's where I am. I am hoping to check the leads on the TPS today with a ohm meter. I know my resistance levels.
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"step on gas, truck feel like it is pulling a house, slight buck, but with more gas it moves, it has good presure out the exhast, all wheels are turning freely, engine idles great has lots of power,"
tested, cyl pressure, fine
check engine timing, fine
made sure all wheels spin freely, fine
check all fluids, fine
slight pinging sound can be heard, from time to time from center of truck. I'm thinking torque convertor. Feels like engine is binding only when you put it in gear.
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My Burb starts right up when the engine compartment is cold. Can barely touch the key and the thing fires right up.
Once engine compartment is hot (operating temp), I shut off the motor, let it sit for a few minutes and I get about 3-5 seconds of dry start each time I start it. It fires right up, runs great after that dry start period.
The dry-start behaves as if it's starved for fuel for those 3-5 seconds.
It's a K1500 with a stock 5.7l (350 ci). 180,000 miles and the entire drivetrain runs like a top. Only mod I've made is a K&N cold air intake.
Here's what I've done/changed recently (i.e. within the past 5k miles):
Fuel pump, OEM installed by dealer.Fuel filter.Ignition control module, BWD.Ignition coil, BWD.Crankshaft position sensor, GM OEM.Engine coolant temp sensor, BWD.Oxygen sensors (all four), GM OEM.Catalytic converter, replaced one of the two.Plug wires, BWD.Plugs, Delco OEM.Distributor cap and rotor, BWD.Cleaned ground connection (bolts to frame) for fuel pump.Alternator, new not reman.PCV valve.Battery.
Full diagnostics by a very qualified shop two weeks ago, no bleedback from injector spider, fuel pressure solid and holds perfectly. After 90 minutes of troubleshooting, the mechanics finally gave up.
One last thing with potential that I can think of is that I started running ethanol-free gas around the same time this issue surfaced. Not at the exact time, but at a relatively similar time. Gas mileage has increased by 40% and power increased, hard to blame "bad gas."
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My 1994 Chevy Suburban will not engage the front drive shaft. It has an electric actuator and it will not engage. the transfer case engages but not the front axal. When I shift the transfer case into 4Hi or 4Low it will shift itself but the light will not turn on. I have heared rumors that you might have to manualy connect it to the battery and have a kill switch in the cab. What is the problem and should I connect it manualy?
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2003 Chevy suburban, 115K miles, accelerating I hear a squeal/groan/clicking noise coming from right front of engine. Did not happen this winter, started again in spring. Loses power if stay on accelerator. If let off and then reapply, it will momentarily go away. Appears to be only when air conditioning on. Bad AC or just the pulley?
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Recently I've been noticing a gas smell after parking my car after the drive home from work, but engine performance and mileage efficiency didn't seem affected, and I found no visible evidence of leaking on the ground (nor in the engine, but I likely don't know the right places to look).
Today, with the engine running, I looked around the engine to see if I could locate any gas leakage -- I located the fuel pressure regulator (I think; a golf-ball sized acorn on the right of the engine with a hose coming in the top and a pipe coming out the bottom and going down and to the left) and didn't see any leaking during my brief test. I'll check it again after my drive home tonight.
One new thing I did discover, though; while in park, when I slowly pressed on the accelerator, there would be a point where the engine started losing power and going into a rev/slowdown cycle: about a second or two of revving, then a half second of slowing down. This was while cold and in park; I've not experienced this in normal driving.
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I have an '05 Suburban with starting issues. When it's cold out (below 40 degrees) and you turn the key, all accessories come on but truck will not crank. It then seems like the power just cuts off.......dash lights go out but gauges are fixed in place and a couple of seconds later, I hear a strange buzzing noise from the dash area behind the radio and the gauges will then go to power off position. Then if I try to start it, there is nothing, no lights on dash, no starter engaging, no clicking of the relays, nothing. I tried, on a hunch to disconnect the ground lead from the battery. Had it off for 10 minutes or so, put the cable back on, tightened it down (wasn't loose to begin with) and it started right up first try in 20 degree weather. I had previously had the battery and alt checked and both were good.
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My 04 Chevy suburban blows cold for about 15 minutes then turns hot...sometimes it will turn back cold, but not lately
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I have a 1994 V6 Chevrolet Camaro with ~197K miles. Recently I have noticed that after starting the engine it idles rougher than normal and also as I accelerate, especially between 45 and 65 mph. Several things have just been replaced and/or fixed: spark plugs, spark plug cables, oil, coil packs, water pump, & thermostat. I regularly use premium gasoline and when for some reason a lower octane is used I add an octane booster. Since this problem arose I tried a fuel system cleaner; it hasn't worked thus far. The last time something like this happened, I took my Camaro to a trusted repair shop and when being diagnosed its' cylinder chambers and many different lines flooded with fuel. After replacing the fuel regulator my car returned to normal.
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I have issues with engine starting when cold outside or after rain. This only happens when engine is cold and has not been started for a day or 2. Distributor cap does not have any condensation inside but does seem to corrode on contact points. Engine turns over fine, has fuel and spark. When this happens engine will not fire and after awhile it will start to fire and lock up when it fires then continue cranking. After repeated attempts it will start and run fine, can be shut off and start right back up with out any issues. It could take a few tries to a few hours of trying before running though. I'm leaning toward a distributor or timing issue. Am I on the right track? 98 Suburban K1500 5.7L ....
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1995 Suburban loses power when its warm and backfires through the throttle body when floored..
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I bought a 99 Suburban 4x4 with 205,000 miles for hunting, I recently took it to my property in the Texas Hill Country. The road to my property consists of dirt with large rocks, you are required to lock in 4 low and to the climb, on a very steep hill I reached about 3/4 of the way up when the suburban had no power, it idled but my foot was all the way down on the pedal and the tires would not turn or spin out, I backed down and tried going a little faster, same place it stopped moving and this time the oil pressure dropped and the check your gauges light came on, once again I backed it down. On a level surface it drives great but on a steep incline it develops this problem.
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I have a huge problem. My 94 ranger 2.3L 5 speed manual transmission, has problems with idoling while it's cold, has no power going uphill and stalls when I slow down to stop. This is all after putting a new motor in. The old one was running ok with 310,000 but lagging bad. I figured with the driving I do, a new motor wouldn't be a bad thing. Boy, was I wrong. It has been a nightmare. But once the truck is up to operating temperature, it runs so smooth you wouldn't think there was a problem. But let it cool off, restart, and boom! There it is. We have changed so many parts and sensors with absolutely no change to the original problem. It's very frustrating. I just can't let this problem win. I will figure it out.
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I have a ticking noise that seems to be coming from the drivers side of the engine. 2000 Excursion. It only happens when accelerating in every gear between 1400-2100. No noise at idle or park. Same noise when cold or warm, again only when accelerating. Goes away when you take your foot off gas. New exhaust studs, exhaust does not seem to be leaking, no carbon build up anywhere. No engine codes. Truck runs great and no loss of power. V10 with 120 k on it. Really annoying.
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I have random power drop off (best description is a loss then a surge or something like a skip) when driving over 60 mph. If I let off the gas or floor it the problem goes away temporarily. No mechanic has been able to figure it out. Chevy dealer just says "we don't have any codes".
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What the problem is with my 94 Saturn Sl2? It seems to loose power going up hill. Also I have put in a new alternator and battery, because the battery would go dead after driving for a while. ABS light remains on as well. Also have pinging noise coming from below the emergency brake area, after I have driven it for a little while. Even if it sits idling at times, it will drag down the battery or something, because it will kill and go dead. Could there be a short somewhere?
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I have a 1992 k1500 5.0L. The pickup seems to run good, or at least better when it's cold and engine isn't to operating temp. But once it reaches temp it loses a noticeable amount of power, as well as has a "dead spot" in throttle response. From about 1/2 to 3/4 it's like nothing happens you push the pedal but no response. Only at about 3/4 once it down shifts then you get an increase in speed. So now back to power loss. It is bad enough that just to maintain a highway speed of 60mph it will downshift even on very small hills and on flat ground the pedal is about 3/4 of the way to the floor.
Some history: It has a rebuilt transmission in it with a 2000 rpm stall converter instead of stock(so two questions one when I re installed the kick down cable could I have adjusted it wrong and could this cause my issue, and what's the proper way to adjust? Second could the 2000 rpm stall converter cause any issues?)
It has a new distributor, cap, rotor, along with plugs and wires. I recently installed: knock sensor, map sensor, coolant temperature control sensor, tps sensor, egr valve, pcv valve, ecm, rebuilt the throttle body, as well as a few other things I'm probably forgetting.
I suspect the engine is running rich because the exhaust tail pipe has a lot of soot(it has no cat was that way when I bought it but it has way more soot than it should even with no cat.) I just checked fuel pressure and it's right at 11 to 12 psi. I haven't pulled plugs yet to confirm rich condition, but last time I changed them they were all black as coal.
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My daughter drives a 94 Century (120+ K) and it was running great, no issues to speak of. Thursday morning she was advised that her brake lights were stuck on when the car was parked in school lot. This drained the battery. The battery was very old so she got a new one properly size & installed; the car started up and drove fine. Later that evening it started up and drove again with no issues.Next morning; NOTHING; No Start. I checked and when door is opened interior lights come on, insert key and door chime rings. Turn key and there is nothing at all, a total loss of power, lights go out, door stops chiming but nothing. Starter never engages, no noise, no attempts of the engine to turn, remove key and lights return and door chimes!
1994 Buick Century 3.1L SFI OHV 6cyl .....
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