The truck has been acting a little weird lately after I start it and drive it a little ways. When I come to a stop, the truck feels like it is going to stall. If I rev it up, the problem goes away until I start it up again. If after I start the truck and I don't stop anywhere, the truck will backfire once when I am gearing down. It only does it once and then it is fine. My truck has the 22R. Any thoughts?
is it getting horrible gas milage? my gas milage hasw gone way down the hill and I don't know why. my exhaust broke below the manifold so I put a header on it and ever since the gas milage has been horrible. So I then put a new 02 sensor in it and it still hasn't solved the problem. I'm thinking part of the reason might be because my intake pipe is messed up so I just bought a cold air intake to go on it so maybe that will help.. I've done a tune up on it a few months back and I also put a new coil on it because my other one was shot. when I get the Cold air intake on I'll tell you if it helps. But I would definately see if you have any air leaks.
I think he has a carb... right dw8? The header should have made your mileage better... mine did. and if you leaking air into the intake after the AFM you should run lean not rich thus less gas usage not more and closer to detonation. My old 91's mileage went way down before I parked it and a few months later when running it just so it wasn't just sitting I found out the real problem was the fuel line was rusting out on top of the tank and pissin fuel all over the ground... check for a fuel leak... As far as the owner of this thread... the fuel filter is good advice and a basic tune up which includes tuning the carb may be in order... Good luck guys! My mileage sucks on my 87 4x4 too... but fortunately and unfortunately... it's because of the turbo...
do you have a exhaust leak? if no then i blame the vacume system inspect/replace ALL your vac lines one at a time. and check your intake for leaks. carb clean is your new best friend
Yes, my truck is carbed. I noticed recently that if I let the truck try to stall when it acts up, it won't. It's like the truck falls flat on its face for 3 seconds and then the idle comes back and all is well. The truck doesn't sound like it has an exhaust leak. But when it backfires, it shouds like it is leaking through the muffler area.
try putting some carb cleaner threw it... also, have u done a recent tune up? when does it do it, first crank up, cold or when the motor is hot? im trying to think of what it could be..
The only thing that hasn't been replaced under the hood is the distributor cap/rotor. It does this only when it is cold. And will only do it once. When it warms up, it will not do it again.
There's a tube from the air tube between the air flow meter & carb,throttle body, it goes to the Resonator,a round canister at the passenger side of the engine. If that is lose or off the engine wants to kill & can cause a backfire!! As for the header, loss of mileage. If you have a EFI engine, & the 02 sensor is bad it can cause this!
I just put a new o2 sensor in mine and it's still running like ****. Like just a while ago I went into town came back to the shop, the truck sat about 30-45 minutes and when I started it up again it started sputtering and was wanting to stall. so when I got to the house (which is right beside the shop) it just stalled right in the driveway. it's fine as long as I keep my foot on the gas but if I take my foot off the pedal it starts sputtering. This is very aggravating!
haven't really paid attention. But I dunno why it wouldn't be getting fuel. I replaced my fuel pump like 2 months ago and I my fuel filter probably 6 months ago. Maybe I'll try another filter. i just spent 2 grand on my stuff to bag it. This truck is gonna break me
do u have teh stock carb on it still? if anything try adjusting the idle screw and/or the fuel screw...that might help
Somehow you managed to blur the lines between carbed and fuel injection. I have a carbed truck. No air tube or air meter. Lol.
Seth/Twisted Mini's just posted on Street Source having the same kind of problem. Said he got the fuel feed & output lines reversed ( labeled wrong)! If you have had these lines off try reversing them!
dw8- i know you said "the only thing not new under the hood..." does that include the vac lines? ALL the lines should be snug on the fittings, meaning a lil bit of work should be required to pull em off, they should not just slip off. inspect your exhaust for leaks, if its been awhile there will be a black carbon build up where it is leaking. back firing is either timing or a exhaust leak period. the falling on its face when returning to idle makes me thing its a timing and vacume thing, it could be that your vac advance is not receiving enuff signal (vac pressure) to function correctly due to a clogged or leaking line. start your car and let it warm up till the idle drops. where is it idling ? (rpm) now take a can of carb clean and spray all the vac fittings some what methodicly if RPM's increase you have found a leak. dont forget to hit the base of the carb and intake gasket.
listen you need to stop driving it right now!! seriously because what u have is a small problem that in a short time leads to a VERY BIG ONE!! all these other guys are wrong trust me well u probably drive pretty fast normally right yeah me too and have u had to go really slow for a long period of time due to the icey roads well im almost more than positive that you have a leak in yur head gasket so stop driving it and fix it before its too late cus i just ignored the same symptoms yur having and then finally it stalled on me so then i look under the hood only to discover a very unpleasant oil and water mixture pouring out of my cold air intake filter so yeah trust me on this one im havin to pay like $600 to get it fixed right now
