bad sputtering and backfiring problems....
#1
bad sputtering and backfiring problems....
well my girl is gettin sick whenever i start her up she starts fine. then then rpms come down after the initial rev and flucuate from 600 rpm to about 900 rpm. when this is happening the oil pressure gauge jumps around randomly, but never goes below the red line at the bottom... now if i put my foot on the gas bringing the rpms up to about 1200 it will stay steady. if i dont warm it all the way up to normal running temp before i start driving it will backfire badly in second gear when im accelerating. it even backfired in 4th gear yesterday and even after it warmed up it backfired. im not sure whats going on, was wondering if anyone else has had this problem before. i put new plugs, wires, and distributor cap in it about a year ago. im guessing its not that. its frpp 9mm wires, oem plugs and msd cap. also im not sure if this is related but the other day i stoped suddenly and my car stalled, when it did the amp light and the check engine light came on. i restarted it and they both went off... anyways if anyone has any ideas what it could be im all ears... btw its an 88 gt with stock engine, either 330k miles or 230k, but the previous owner said it was rebuilt.... i dunno any help would be greatly appriciated... thank you
#5
RE: bad sputtering and backfiring problems....
ORIGINAL: 8850gt
the check engine light isnt on, so i dont know if any codes will pop up....
the check engine light isnt on, so i dont know if any codes will pop up....
#7
RE: bad sputtering and backfiring problems....
88, speed density or converted to MAF? Mine was doing similar things and eventually found it to be vacuum related to the hose to the MAP being old and rotted. Mine was a pin hole leak and it made the car run like crap and misfire here and there and buck around. Replaced the hose and presto runs like a champ... well a ugly partially paint stripped, old rotted tires, ripped top champ anyway
#8
RE: bad sputtering and backfiring problems....
its converted to maf, how would i check for the vaccum leak? it only does it when i first start up, and it doesnt do it everytime. sometimes when i start it up, it runs fine... and sometimes its worse than other times...
#9
RE: bad sputtering and backfiring problems....
If its been converted clean IAC and MAF first, verify the spliced in pigtail wiring has not come loose. There are many ways to check a vac leak, everyone like something different. Professionals use smoke, some spray a shot of carb cleaner around suspected areas, I personally use a plumbers torch witha rubber hose.Iturn on the valve and move the end of the hose around the vacuum hoses and ports and listen for a change in the idle...
#10
RE: bad sputtering and backfiring problems....
ug, im not very good at doing this kind of troubleshooting think it would be a good idea to take it to my mechanic? just dont want him to give me alaundry list of stuff i dont really need to fix....