rought idle, bucking at crusing speeds
like the title says, i've got a 92 lx 5.0 5 speed. it wants to die out when i first start it cold. and the idle jumps around from about 500 to 1500 till its warm. then it idles very rought like it's got a cam. but its bone stock with just basic bolt on's. and when im cruising below say 2500 rpm in any gear it bucks and when i let off the gas still in gear it gets even worse. any idea what it could be?
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I gave it a tune-up about 4k miles ago. fuel filters less miles than that. timings set to 12*. the problem only started a couple days ago. bolts are shorty headers, off road hpipe, underdrive pulleys, bbk fender intake. also all the tune up parts are msd. it has autolite 25's gapped to .045. i guess ill start by cleaning some sensors.
Run the codes first PLEASE!! Nothing wrong with cleaning sensors, but dont get side tracked, from the most important part of diagnosing problems such as yours. Codes are free to do, and only take a small amount of time. If anything the codes will help you figure out what sensors to try and clean.I gave it a tune-up about 4k miles ago. fuel filters less miles than that. timings set to 12*. the problem only started a couple days ago. bolts are shorty headers, off road hpipe, underdrive pulleys, bbk fender intake. also all the tune up parts are msd. it has autolite 25's gapped to .045. i guess ill start by cleaning some sensors.
You can use the scanner if you choose. But the link I provided is REAL simple. JUMPER and a TEST LIGHT. Hardly gets any simpler than that, as far a elctronics goes. But I have seen where scanners have not been so acurate at times. If you use the link i gave, just make sure you dont use the Hood light terminal. :bigthumbsup
Also, you may want to check out your "salt and pepper" shakers - the black and white ten-pin connectors located on the back of your upper intake manifold. Cleaning these with a pick, electrical cleaner and some dielectric grease did me wonders and I was having a very similar problem.
While you're at it, you may want to use a pick to open up the male pins a bit to make the connection a bit tighter. Hope this helps! :bigthumbsup
While you're at it, you may want to use a pick to open up the male pins a bit to make the connection a bit tighter. Hope this helps! :bigthumbsup
Very Good Suggestion:bigthumbsupAlso, you may want to check out your "salt and pepper" shakers - the black and white ten-pin connectors located on the back of your upper intake manifold. Cleaning these with a pick, electrical cleaner and some dielectric grease did me wonders and I was having a very similar problem.
While you're at it, you may want to use a pick to open up the male pins a bit to make the connection a bit tighter. Hope this helps! :bigthumbsup
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