1995 4.3 Blazer Runs Bad And Stops - RPM Start Jumping Between 1500 To 2500
Jun 30, 2012
I've got a "new" Blazer -95 4.3 vin W about a month ago. It has run about 170,000 km.
But now it looks like it was a bad buy, it runs bad. The rpm starts jumping between 1500 - 2500. Suddenly the break and ABS warning lights in dashboard lights up, and sometimes all black out and it stalls.
At first it started acting like this when towing a trailer on the highway, doing 80 km/h. But now it does it at any speed.
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So my 98 f150 xlt 4.6 is having a issue where the truck is jumping from 1500 rpm to about 2500 - 2600 rpm. You know sitting there trying to get up to speed. then all the sudden i look down and its at 1500 rpm. but still not really going anywhere. So i give it a little more throttle or gas and it jumps from 1500 to about 2500. Its been like this for a month but i thought it was crap fuel. What is the cause or maybe a solution?
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My pickup runs smooth 95% of the time. It runs rough at red lights and when pulling away from stops. It seems to happen more when the A/C is on.
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I have a 1995 Dodge neon 2.0 SOHC. It stars, runs for a few minutes, then dies. Then when I try again it will run for a few seconds before it dies. After that I do not hear my fuel pump engage when I turn they key. It takes about a day before it repeats this process.
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1995 G20 5.7L... This van runs great when first started and continues to run fine after it's warmed up and will do so until it’s turned off and restarted. When first started vacuum at idle is steady at 21” and 10” at 55mph cruising speed. I can continue driving for an hour or so and it will continue to run fine. It's only when I shut it down and restart after 20 minutes or so that I have a rough running condition. After parking for 10 to 20 minutes and restarting idle is still steady at 21” vacuum but the van hesitates on acceleration and runs rough at cruise with a 5” vacuum. If I continue to drive I get low vacuum trouble codes for the MAP and Oxygen sensors. I’ve replaced the oxygen sensor and performed a diagnostic on the MAP sensor which checks out ok. I’ve checked for vacuum leaks – none found. I've replaced the spark plugs, cap and rotor. What to look at next?
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So I'm having some fun issues with my S10 Blazer right now.
1992 S10 Blazer 4x4 4.3L TBI, 4-speed auto (not electronic)
ABS Codes- 41, 42, 46, 51, 52, 65, 67, 68
The speedometer is jumping around sporadically.
Gas mileage has dropped astoundingly. Tank has gotten me 80 miles!!!! Poorest MPG ever!!
Also, may be related, the tranny has shifted properly for awhile. Slips from 4th to 3rd when letting off the gas at highway speed, and won't detente shift 4th to 3rd even with the gas completely floored. I had the tranny rebuilt in November and had the detente cable replaced a couple of weeks ago. I'm going to make sure it was adjusted correctly today by using the shop manual method: shift the cable back and ratchet forward with throttle or gas pedal.
As far as the ABS and speedometer go, I'm going to test what I can with the vehicle speed sensor (VSS) and the DRAC module today. With my WinALDL scan tool, I found it is definitely not a speedometer issue because the speed coming from the computer is fluctuating as well.
There is a test in the shop manual to do, but are there any other tests for the VSS or DRAC module? Reason here is because I replaced the VSS after the tranny rebuild in November. So either the DRAC module is acting up or something in the transfer case is screwed.
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Mechanics say they don’t know what wrong… I had some transmission work done on my truck – mostly an leak and replacing the harness – and ever since then after it rains or if we have a heavy dew my truck does the following:
Driving from O to 49 miles an hour truck is fine, as soon as I hit 50 the truck starts surging and you can see the tachometer jumping from 2000 RPM to 2500 RPMs. I drive around 17 miles to work where my truck will sit for seven hours. On the way home the truck is fine. I find this to be more of a problem when the truck has sat for a day or two over the weekend without driving it. Sometimes the “check engine” light will come on, sometimes not.
I have taken it to two different places and neither one says they can find anything wrong with the truck. I have driven this truck for over 11 years and know it very well. There is something wrong, but what? 1993 Chevy Silverado 3500 Diesel....
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My 2008 Accent started to stutter between 1500 and 2500 rpms. Now the check engine light has come on, and the engine is idling rough.
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I have a 2003 Camry 2.4 LE with 120k miles on it. It's been very well taken care of. As of now, here is the maintenance that has been completed at my dealership. By the way, I don't trust dealerships, but I do have one nearby that is actually beyond outstanding (and I know a little about cars):
- Regular oil changes, and always with 5W-30
- Radiator flush and thermostat replacement
- Tranny flush
- New front brakes, rear brakes cleaned, and lines flushed.
- Oil pan gasket replaced
- Valve cover gasket replaced
- Spark plugs replaced (at around 105k)
So, with this information being provided, here is my current problem. Lately, as I accelerate between 1500-2500 rpms, the engine has a louder than usual (but not too loud) groaning noise. Basically, the engine just sounds a tad louder than normal along with groaning noise. The engine also feels as though it is running kind of "dry" (if that makes any sense).
Now, above 2500 rpms, it's just fine. It's amazing on the highway, but I feel as though it has slightly lost acceleration in the city. The only issue with the car is the infamous greyish/blue smoke at startup, but that rarely happens and when it does, its a small amount of smoke, and it has never affected it's performance or gas mileage. Another thing is that I had to have that dreaded oil splash guard removed, because apparently the timing chain punctured it and it was about to fall off.
This problem has been recent within the last month. Just before this, the car has been on a roundtrip to Tucson from Tulsa, and Amarillo twice, complete with 32+mpg on the highway! So, what's wrong? Serptentine belt? PCV valve? Cam or something underneath the valve cover?
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My wife drives a 2002 Hyundai Elantra GT. Recently the car started idling very rough with rpm jumps back and forth from 1500 to 2500 rpm. The check engine light came on and threw a code for the IAC. I also notice a clicking sound coming from the engine and I can see sparks arching at the coil/plug wire. The arching is happening at the coil with the numbers 1 & 4.
The car is difficult to drive. It shakes and surges and isn't pleasant to drive at all. These issues started happening very recently. The car ran great up until now. We've stopped driving it for the time being until we solve the problem.
We had the car serviced a few years ago and they changed the IAC and mentioned something about a gray wire that we should watch out for.
I'm not really sure what the issue is. I don't know if it is the spark plugs, wires, or coil. Or it could be the IAC or something else. I'm comfortable working on the car myself, but I would rather not try fixing many things if it is just one thing actually wrong.
So far, the only thing I've tried is to spray some carb cleaner into the throttle body towards the IAC in hopes that it would clean it and solve my problems.
Where the IAC is located. I want to try remove and clean it, but I'm unsure of exactly where it it. I know it is somewhere on the throttle body or intake manifold, but I'm not sure exactly what I'm looking for.
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I have a 2002 Accent 1.6L 72K miles, idle surging between 1500 - 2500 rpm after stopping from 50 mph, (with Code P0121) replaced TPS - No Luck . I reset the DTS error codes, ran it with a new TPS and same exact problem, Code P0121 came back, and surging continued, this happens when I decelerate from high speed- 50 mph or so and it will not go to normal idle, surges between 1500 and 2500 rpm when in park.
If I give the throttle pedal a good kick, the problem goes away, and it idles fine, nice and smooth and at normal rpm, the DTS code will clear, and stays cleared, mil light goes out. It almost seems like something is sticking, I know its not the throttle itself because when I do a live data, the TPS shows "0", if I manually push the throttle shaft closed at the throttle body, it is fully seated shut, so I know its not a sticking cable or anything. Can a sticking MAF sensor cause this? Maybe what I'll try tomorrow is rapping the throttle body with a rubber mallet while its surging, maybe something is not returning to its normal position in there.
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!995 honda accord, 5 speed. Idle is fine until the engine warms up, then fluctuates between 1500 to 2500 rpms. The idle control valve was cleaned- no change. Valve was also replaced -also with no change. Put old valve back on. Computer was disconnected after cleaning and also after each valve change.Would the next step be to remove and clean the fast idle thermo sensor? Also how do you check the coolant lines coming in. Anything else I would need to check, clean or replace.
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I have an 04 6.0 F250. I am having a shaking between 1500 and 2500 RPM around 45 - 55 MPH. I have no guesses what is calling this, but the truck runs fine otherwise.
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I have been given a 95 S10 Blazer 2dr because the owner could not afford to have it put into the shop. Literally, GIVEN. Anyways, to start off the battery was as dead as it could be so I gave it a good 2 day charge and started troubleshooting. Here are some symptoms:
Problem cranking (acts like its not getting proper fuel, or maybe too much? However, I don't smell fuel like its flooding out)
IF, it cranks, it will idle very roughly and usually die shortly after
IF it doesn't die shortly after cranking, any attempt at using the gas pedal causes a rough/irregular throttle response usually followed by it dying.
The VERY first time I cranked it after charging the battery, it cranked perfectly and drove/idled as smooth as ice. I let it idle for about 30 minutes making sure it wouldn't overheat or anything else. Everything did fine, I killed it and cranked it again later THEN encountering the problems described above. It's been the same since.
So, some of my guesses (keeping in mind I'm not very familiar with these vehicles) some type of sensor (crank/idle), bad vacuum leak or a loose connection somewhere in the electronics. Looking for some type of confirmation before I waste money throwing parts at it.
Also, included a short video of what it's like trying to crank and running. [URL] ....
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Have a 95 Chevy blazer 4wd automatic on the column. Tonight I pulled in my house put it in park and turned it off. Took my foot off the brake and it started rolling. I noticed it didn't go in to park. I tried a free times and the shifter goes all the way up but the park doesn't engage and the light doesn't come on. I put it in neutral and used the e brake but am wondering what caused this and if it could be a big problem in the near future.
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My mothers 95 blazer LS coolant is disappearing. A friend said if it's not on the ground than it's in the engine somewhere. oil pan search looked coffee looking?
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My F150 with 175,000 miles on gave me a the ol' P0305 code indicating misfiring in cylinder #5. I changed the plugs and wires using Motorcraft wires and Motorcraft AGS34FM plugs.
Now the truck idles fine, does not give a OBD code but runs rough at 2,000-2,500 rpm. Tried it out on the highway and it started "bucking" a bit. Not sure what to try next.
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Do I have to pull out the complete switch assembly, or could it be some thing else?
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My plan to clean the fuel injectors on my 2008 Silverado LS 4.8L V8 came to an abrupt halt when I was unable to disable the fuel pump relay because it is missing from the spot where it should be located according to the schematic in the owner's manual. Would removing the "fuel system control module" (fuse #21) instead of the fuel pump relay work?
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We have replaced crank position sensor, ecm/ coil packs and computer. got good pressure on fuel rail. Starts cold, will run normally for approximately 5 minutes before it dies and will not start.
Sometimes we can hold accelerator to floor and it will "hit" a few licks but promptly dies when accelerator is released. We've checked fuses and relays; what are we missing?
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Well I did it, moved Prius out of garage to drive, working on other car when Prius engine starts up runs a bit then stops. You should have seen the look on my wife's face, she just kept looking a me for a reason it would do that. We are still learning a lot about the Prius and she thought it may be normal. I started to tell her some high tech lie but decided to fess up and admit I had forgot to push the off button.
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