Spark Plug Foul?
#1
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Car: 1989 Firebird
Engine: 2.8 Litre V6
Transmission: 4 Speed Auto
Spark Plug Foul?
Hi All
I have a 1989 2.8 litre V6 Firebird whose engine has started to idle erratically.
The rev counter needle jumps around the gauge but the engine revs do not follow. However the engine seems powerless and whilst it does not stall it does not run smoothly.
Is this Spark Plug Foul?
What is Spark Plug Foul?
What can I do to solve this?
Many thanks
I have a 1989 2.8 litre V6 Firebird whose engine has started to idle erratically.
The rev counter needle jumps around the gauge but the engine revs do not follow. However the engine seems powerless and whilst it does not stall it does not run smoothly.
Is this Spark Plug Foul?
What is Spark Plug Foul?
What can I do to solve this?
Many thanks
#2
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Car: 89 Camaro RS running MS2X
Engine: .48/.60AR T3/T4 2.8L V6
Transmission: Rebuilt 700R4 2500 stall
Axle/Gears: Next to break...
Not 100% but it sounds like the ICM, or ignition control module. Does it have a misfire? And does that misfire correspond to the tach jumping?
Also, do you have a book for the car? If you do there should be a page which shows all the different conditions of the spark plugs and what those conditions mean.
Always a good idea to have a book for the car.
Also, do you have a book for the car? If you do there should be a page which shows all the different conditions of the spark plugs and what those conditions mean.
Always a good idea to have a book for the car.
#3
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Car: 1989 Firebird
Engine: 2.8 Litre V6
Transmission: 4 Speed Auto
Re: Spark Plug Foul?
Thanks for this.
What I did not write last time was that cables on the battery were loose and I tightened the connections. Have driven the car today and all seems to be ok now (until the next time)!!
What I did not write last time was that cables on the battery were loose and I tightened the connections. Have driven the car today and all seems to be ok now (until the next time)!!
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Car: 91 Firebird/88 Firebird/91 Formula
Engine: V6 3.1/V8 5.0/V8 5.0
Transmission: 4L60/700R4/4L60
Axle/Gears: 3.23/2.73/2.73
Re: Spark Plug Foul?
If you still have the original fuel injectors you might want to check the ohms and see if they are your problem. Also check your fuel pressure regulator (FPR) to make sure it's not leaking. Good luck.
#5
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Car: 1989 Firebird
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Re: Spark Plug Foul?
Thanks for the information - I assume that these are not "do it yourself jobs"?
#6
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Car: 89 Camaro RS running MS2X
Engine: .48/.60AR T3/T4 2.8L V6
Transmission: Rebuilt 700R4 2500 stall
Axle/Gears: Next to break...
The injectors really arent that hard to do, just take your time. It would be a good idea to grab intake gaskets for when you pull the upper intake off. Also if you dont have a digital multimeter to ohm your injectors, they arent really expensive to buy.
If you want to make things easier a book always helps.
If you want to make things easier a book always helps.
#7
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Car: 1991 Camaro RS
Engine: BBC 509 Merlin ii 9.6:1 pump gas
Transmission: ATI pro th350 sfi case. TSI 5500 st
Axle/Gears: Strange S60 4:10s
Re: Spark Plug Foul?
Hearing the the tachometer is bouncing all around and your not gaining rpms in real time, it sounds like a ignition issue.
The ICM sends a signal to the tach and if your icm or even the little reluctor/exciter wheel on the distributor is having problems it will run terrible and send a sketchy signal to your tach and to the ecm as well.
I see your across the way but see if any parts stores over there can test your icm. Ignition control module. Also while you in the distributor area check that everything looks ok, as in there isnt anything loose. I had a reluctor/exciter wheel come loose last year and cause problems like you had. The difference is that I was in the middle of a burn out at the racetrack when it happen.....
Its a job that isnt too difficult with a little research.
The ICM sends a signal to the tach and if your icm or even the little reluctor/exciter wheel on the distributor is having problems it will run terrible and send a sketchy signal to your tach and to the ecm as well.
I see your across the way but see if any parts stores over there can test your icm. Ignition control module. Also while you in the distributor area check that everything looks ok, as in there isnt anything loose. I had a reluctor/exciter wheel come loose last year and cause problems like you had. The difference is that I was in the middle of a burn out at the racetrack when it happen.....
Its a job that isnt too difficult with a little research.
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#8
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Car: 1989 Firebird
Engine: 2.8 Litre V6
Transmission: 4 Speed Auto
Re: Spark Plug Foul?
Dear All
Thanks again for the advance. I will check around the distributor and have the ICM checked.
Thanks again for the advance. I will check around the distributor and have the ICM checked.
#9
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Car: 1987 Camaro Sport Coupe
Engine: 2.8 V6
Transmission: 5 Speed
Axle/Gears: 3.42
Re: Spark Plug Foul?
This is just a question. Is it possible for a bad ICM to cause a dead cylinder and a fuel injector malfunction?
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