ok here is the deal, I have a 98 Chevy Cavalier. a few days ago the check engine light came on. I noticed a slight lack of power and a ticking in my engine. I pulled the spark plug wire off of cylinder #1 while the car was running and had no change in the engine. I then pulled off #'s 2-4 and the engine cycled down as it should. I presumed that cylinder 1 was bad. However a compression check on all four cylinders showed them to be just fine at 150 each. I changed all the spark plugs and the wires. All the spark plugs have gas on their little bottoms and all of the suckers spark like the dickens when I pull off the wires when the car is running. I changed fuel injector #1 and put it all back together and I still have nothing coming from cylinder #1...suggestions? helpful ideas? thoughts on where to get a new computer if that is it?
2007-04-14 06:19:02 · 8 answers · asked by Bunnie R 2 in Cars & Transportation ➔ Maintenance & Repairs
first we really need to know what code the MIL is showing.
it may be many. there may not be a problem with the PCM. it could be a ignition module problem. at this point i recommend taking it to your local dealer instead of throwing parts at it. besides computers have to be programmed by a dealer. they are not plug and play anymore.
2007-04-14 06:34:36 · answer #1 · answered by FLYC3 3 · 0⤊ 0⤋
The ticking could be the spark from number 1 wire going where it shouldn't go. It could be shorting to the head when it's plugged in, but going through the plug when you have it out. If the compression check was good, it's probably not a valve problem.
2007-04-14 15:02:51 · answer #2 · answered by Nomadd 7 · 0⤊ 0⤋
i own a shop and its possible that you have a bad control module on it or a coil pack acting up on it,they will fire sometimes and sometimes not,if none of this helps it could actually be the main ecm on it causing this to happen i have seen it a few times but double check everything before you spend any more money on it,buying stuff you don't need can get really expensive after a while ,good luck with it i hope this helps.
2007-04-14 06:30:16 · answer #3 · answered by dodge man 7 · 0⤊ 0⤋
It could be a simple vacuum leak that is causing a lean condition in cylinder #1.
It's common, and easy to fix.
Look around for a disconnected or cracked vacuum line/hose on the intake manifold, and listen for a sucking noise at idle.
2007-04-14 06:27:30 · answer #4 · answered by Mr. KnowItAll 7 · 0⤊ 0⤋
How loud is the ticking? Could be in the head, like a valve not opening (a rocker broke or spring broke, bad gas can make valves stick and then something has to give)
2007-04-14 08:12:53 · answer #5 · answered by danbot372 2 · 0⤊ 0⤋
have you ever accomplished a compression verify? and eliminate each and all of the plugs from engine formerly finding out. Cylinder compression could be a hundred and twenty +/- 10 psi. If all of us cylinder is extra then which you have discovered the difficulty. to repair a cylinder with low compression regularly ability taking the pinnacle off.
2016-10-22 03:56:31 · answer #6 · answered by Anonymous · 0⤊ 0⤋
look for engine codes first.
that engine is a distributor less.
change the power coil block.
2007-04-14 06:40:15 · answer #7 · answered by Anonymous · 0⤊ 0⤋
do you have a vacum port on the no.1 cylinder
2007-04-14 06:57:37 · answer #8 · answered by blackbutton100 4 · 0⤊ 0⤋