C/K :: 94 K2500 - No Low End Power And Fuel Mileage About 8mpg
Mar 18, 2016
I have a 94 k2500 (true 3/4 ton not light duty) with a 350 and auto trans in it. It has little to no low end power at all I'm not sure it would even peel out in dirt, literally. It's also getting terrible fuel mileage about 8mpg. The idle on the truck once warmed up is a bit low as well. In gear it idles about 700 rpms. Once warmed up I do get a code 35 (IAC code) while idling. Previous owner replaced the IAC 3 months ago though. It also doesn't want to downshift when you get on the gas. I mean it will but you have to press the pedal to the floor for it to do so.
My initial thought was the kickdown cable was not adjusted right, but I looked and realized it doesn't have one cuz it's a 94 and that's the year they switched to an electronically controlled transmission, so the downshift is controlled by the tps. So far I have checked the base timing it's spot on at 0 deg before tdc. I haven't really dug much more into it yet. I know it could be several things like: tps, egr, fuel filter, intake leak, temp sensor etc.....
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As title really, it's a 1997 K2500 Suburban 4x4 auto 454. I haven't used the sub for a while but got in it the other day and it fired up all fine and I then looked to see what fuel I had left only to see the needle right over to full. Well I know it is nearly empty and I've never had the guts to fill the thing or should that be had the funds to fill it to the top, so know it is wrong. I got under the truck and unclipped the rear most wiring connector just infront of the fuel tank but the gauge still reads full. I suspect either the gauge is faulty (so is there anyway of checking) or the sender in the tank or wires in the tank have shorted (again anyway of testing without removing the tank).
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I've had my XB 5-speed for nearly a year and 10000 miles. It as been dead on reliable and fun to drive. My gas mileage has varied from 26 to 31 in mixed driving and from 32 to 35 on the highway. I use premium fuel only because I can get it without ethanol. My fuel mileage also increased a couple of mpg due to getting the power robbing ethanol out. True it is probably not enough to offset the extra expense but I like not having the stuff in my car. My only dissatisfactions has been with the transmission gear ratios. They are way to low. This torquy engine could easily do with a ratio that would drop about 500 rpm for more relaxed highway cruising.
As it is, though, my XB will go up any hill or long grade without breathing hard! Another is the instrumentation. I don't mind the center mounted set-up but speedometer and trip meter for mpg ratings are both inaccurate. My speedo reads about 2.5 mph high and the fuel mileage read out has about the same error, also on the high side. I have the stock 16" tires. The clutch has a narrow engagement band and can be difficult to be smooth on. The car is fairly quiet, is comfortable and this years hot, humid summer has shown it has one of the best air conditioners I have ever experienced in a car. I thought it might be an electric unit rather than a belt driven compressor because there is absolutely no perceived drag when the compressor kicks on.
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A month ago I changed engine oil, oil filter and both fuel filters. All replacement filters are Motorcraft and my mileage is off a solid 2 mpg after the fuel filter replacement.
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Gen 3 .... Driving in Power Mode to obtain the best mileage? I find I am getting better mileage in Power Mode.
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I've changed my knock sensor, my o2 sensor, fuel filter, air filter, alternator, and cut out my cat. Still can't figure out why my truck has no power?
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I just bought my first diesel truck back in November. It's a 2005 F-250 with the 6.0L and the 5 spd torq-shift automatic tranny. Last weekend I drove the truck to South Carolina, about a 600 mile round trip from where I live. On the trip the truck only got 13 mpg! I wasn't towing a trailer and the truck was empty except for me and my suitcase. It's not loaded up with mods or anything, it's completely stock power wise.
I'm extremely disappointing, especially since a friend of mine has a 2006 F-250 identical to mine and he gets up to 21 mpg on his. What can be done to improve my mileage? I'm not a lead-footed driver, and the trip was done with almost all interstate and highway driving, very little driving on back roads or stop and go. If this is the best the truck will get, I'm going to sell it and buy a F-150!
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I have read many different threads regarding the TPS sensor on the pedal and EBPV deletes on the E99 7.3L Powerstrokes. I am trying to troubleshoot some issues with my E99 7.3L. Usually on cool mornings and after not being started for awhile the truck will seem to be stuck in an Idle. This is an intermittent problem that doesn't always happen.
I cleaned the connections to the Tps and the IVS sensor and put them back in. No luck. On another note I am also seeing a reduction in fuel mileage and power like the truck is being restricted. I don't know if these symptoms are related or possibly their own issues. I am troubleshooting and possibly thinking it is the EBPV system that isn't working correctly. Considering doing an EBPV delete with a NON-EBPV Pedestal and Flange.
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My7.3 is idling rough till I pull the fuse for the fuel pump them it will smoothen out I ran a by pass switch to us my truck but the fuel mileage is bad why
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I've got a 08 f250 ext cab long box with the 5.4 gas. I know I know 3/4 ton gas. Trucks got NO power at all loaded and unloaded and really bad fuel mileage. Driving like a grandpa in town I'm getting 7mpg on the hwy unloaded I get 9 or 10mpg loaded on the hwy the trucks working way harder than it should and getting 6mpg.... I'm wanting to swap the 5 4 for a 6.0. Reason I saw 6.0 is my buddy's done egr delete. Bulletproof oil cooler head studs and a edge with attitude chip and has great power and reasonable fuel mileage. How hard is it going to be swapping the motors.
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We gave the Prius a good workout in the rain for the first time today. Central Florida has been having serious amounts of heavy rain, creating water covered roads in our area. Normally the digital fuel mileage display shows around 55 MPG for most of our driving. However today it dropped to the upper forties very quickly.
We were running the wipers on continuous (low and med speeds), the AC (defrost) was running to keep the condensation off the windows, and the headlights were on. I wonder if the extra resistance of the water on the road also had an effect on the fuel mileage.
Even though we hit some fairly deep water and created large amounts of splash, the car tracked straight, the brakes worked well, and the power was totally uninterrupted. Other than the poor fuel milage we were impressed.
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Recently returned from trip from Austin Tx to Monroe LA. Gas mileage decreased from about 43.3 MPG to 38.5 MPG. A little annoyed by this but I guess I can attribute this to the increased weight in the vehicle. Still taking care in for other thing. Maintenance needed light came on & I assume it may be for a 15,000 mi checkup since it is nearing that mark.
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2011 Prius for wife. Mileage has always been upper 40s to low 50s until the last week or so, now she is seeing 35 mpg displayed.
I have asked for a check at fill up. I just pulled the car out to wash it and noticed the engine came on right away, same when I put it back into the garage. In the past we would get part way down the driveway before the engine came on. Also did a code check and no codes found
What are the approximate outside air temps? 40s am 70s pm.
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I've had my car going at 45 mpg the past 2 years. I just hit my 45k mileage mark. I drive mostly on the highway to work so getting 45 mpg is pretty good for me. This last few fill ups, I noticed my gas mileage has gone down to 40 mpg. I thought it was a mistake if it was just once but the last 7 fill ups has been that way. It just went down all of a sudden and has stayed that way.
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We have a garden variety 2007 basic Prius. That description will tell you that I'm no Mechanic. The mileage was between 40 and 43 MPG for years. Now it has suddenly dropped to 33 and 35. The average temp here in Florida is fairly consistent at above 60 F, so that is not it. Oil changed at the dealer, and not overfilled. Tires at the right pressure. Worn to perhaps 50% of their avg tread life. Also, I had the 12 Volt battery replaced at the dealer a few months ago, and no change. Is there a way to check?
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My 2012 Prius v (lowercase v) has about 80,000 miles on it, my work commute is 180 miles round trip daily. I had been getting 40-44 for about the first 18 months of owning/driving the exact same commute. In February I noticed when I filled the tank that the range showed around 370, which seemed odd, it was always over 400. I started tracking my mileage and it declined quickly. By mid-March I was getting a range of 320-340 with each fill up, and calculating MPG of 29-31. The dealer has had the vehicle for over a month now and can't find "anything wrong with it". Ummm, the MPG has dropped about 30%, isn't that something wrong?
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So I kept getting a IAC code on my 94 k2500 with a 5.7L. So I ended up doing a reset for the sensor. I connected a jumper from terminal a to b on the diagnostic connector. I then turned the key to the on position but didn't start it. Waited 30 sec then unplugged the IAC. I then started the engine and attempted to adjust my idle. According to the procedure I read about your supposed to set the idle down to 600 rpms and then shut the engine off re plug in the sensor etc. But the problem that arises is when I try to do this literally the lowest I can get the rpms is 1600. I turn the idle screw until it damn near is out and I still can't get it any lower... So...something isn't right.
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I have a '92 metro that was getting 50+ mpg a few years ago when I drove it. The car has since been given to my daughter and she started complaining that the best she could get was around 39 - 40 mpg. A few months later, it burned an exhaust valve. Upon dis-assembly, I found the EGR valve was not working - passages plugged. I know the EGR caused the burned valve. Could it also be responsible for the lousy fuel mileage?
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I turned on the car, CONS showed 56.0mpg,
backed out of the garage (about 20 feet) 55.8 mpg,
waited for the garage door to close 55.0 mpg (ICE started),
got to the end of the street (about 200 feet) 54.0 mpg
outside temp was 51F, humid, cloudy
had about 90 miles on new tank of fuel
I know you get big swings in fuel economy when you reset the trip on fill ups but I just thought it was funny that the mpg would drop 0.8 mpg while not moving.
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I recently purchased a new prius 2015. When I first got the vehicle and filed up it would say I had approximately 600 miles to go now it says I have approximately 400 something and I actually get a little under 400. So how many miles do you get let tank? Are they mostly highway or town miles? When you fill up how many miles does your car say you have? Also I was wondering how to actually get battery meter to ever say full I can never seem to get the last bar. And when I purchased the car they told me I couldn't go any faster then 15mph in ev mode but I actually can't go any faster then 8 mpg which kind of mashes the feature useless.
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My 2006 Prius used to get GREAt gas mileage - 48 mpg around town and 55 mpg on the highway. Recently and all of a sudden, my mpg's have taken a nose dive. I now get 35 mpg! When I'm on the highway, I barely get 44 mpg. I took it to the dealer and they couldn't find anything so they are insistant that it's my driving, oxygenated gas and/or my tire pressure (even though they didn't check the tire pressure).
My driving hasn't changed; my friend with a 2004 Prius buys her gas at the same station and she's still getting ~48 mpg so I'm thinking it's not the gas; and I am OCD about keeping my pressure constant. (I own a compressor and check the tire pressure A LOT.) I drive 5 miles to work - about 15-20 minutes - on relatively level paved roads. About 2-3 times a week I travel longer distances at highway speed. I wash and wax the car fairly regularly to reduce wind drag. I have noticed periodically when I'm coasting downhill, my mpg's are less than 20 mpg so I'm thinking something's terribly wrong.
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