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post #1 of 4 (permalink) Old 05-09-02, 05:33 PM Thread Starter
Poor IT guy
 
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Join Date: Jun 2001
Location: Perth WA
Age: 35
Posts: 506
Backfiring

My old mans V8 EF is missing and backfiring when it's cold. The only way to stop it is to give it a boot full. I suspect it's the TPS as it has a delay when you accelerate even when it's warmed up ie put your foot half way down, doesn't do any thing for a second or two and then the power kicks in. It seems like fuel is arriving a bit late.

Anyone had a similar problem or know what could be causing it?

Thanks

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post #2 of 4 (permalink) Old 05-09-02, 05:49 PM
Two SC 61's = trouble
 
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Location: Penrith,nswAus/Morrinville.NZ
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Check temp senser,egr is working properly.Is it starting like it is NOT going to cold start,idle slow.Back fires through inlet as you start to take off part throttle,then clears when 3/4 throttle? I guess the engine temp senser.
Could be tps? Use a voltmeter[D.C/ V] to check that volage slowly rises eveny to 5v at full throttle.koeo ..
Make sure the plugs and leads/cap are in good nick if not complete combustion, the o2 sensers pick this as rich and it will make it run lean..

Another check the connections on harness behind inlet,take out check for corrosion? put back should be enough.hth..

Don't be afraid to try something new. Remember, amateurs built the Ark...Professionals built the Titanic!
.
Tuned & maintained by "Peppertree Perfmormance". Dart block, Scat 4340 steel crank, Custom C.P pistons.Oliver rods.. Mal Wood twin plate clutch.. Twin SC61/2's,482 rwkw/ 645 rwhp..
Passengers, myocardial infarction material..
R.I.P Possum...
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post #3 of 4 (permalink) Old 05-09-02, 06:25 PM Thread Starter
Poor IT guy
 
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Join Date: Jun 2001
Location: Perth WA
Age: 35
Posts: 506
It does idle low when it's cold but doesn't backfire at idle. It backfires when taking off unless you give it a bit of stick.

Could be the engine temp sensor I guess. This would cause it to be to lean and backfire through the inlet manifold.

Will check the other things later today.

Thanks
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post #4 of 4 (permalink) Old 05-09-02, 06:48 PM
Two SC 61's = trouble
 
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Join Date: Jul 2001
Location: Penrith,nswAus/Morrinville.NZ
Age: 62
Posts: 6,360
Yep I guess it's like a carb motor with a stuffed accelerator pump.When you open the throttle it leans out real bad..

Don't be afraid to try something new. Remember, amateurs built the Ark...Professionals built the Titanic!
.
Tuned & maintained by "Peppertree Perfmormance". Dart block, Scat 4340 steel crank, Custom C.P pistons.Oliver rods.. Mal Wood twin plate clutch.. Twin SC61/2's,482 rwkw/ 645 rwhp..
Passengers, myocardial infarction material..
R.I.P Possum...
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