can't get it to idle
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Member
Joined: Sep 2002
Posts: 182
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From: Louisville Kentucky
Car: 1991 Pontiac Firebird
Engine: 3.1 V6
Transmission: 700R4
can't get it to idle
Hey guys,
I've put an XE294H cam shaft into my TPI engine, and now I can't get this thing to idle at any setting (fuel and spark). any ideas?
I've put an XE294H cam shaft into my TPI engine, and now I can't get this thing to idle at any setting (fuel and spark). any ideas?
Supreme Member
Joined: Jul 1999
Posts: 18,457
Likes: 16
From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
Too much cam
Wrong cam
Not enough induction system
Needs chip programming and even them the cam is at least 2 cams too big to have any hope of running right in any motor smaller than a 400
Maybe some other things too, but I suspect all of them have something to do with a very bad cam selection, a total mismatch for TPI in every possible way.
Wrong cam
Not enough induction system
Needs chip programming and even them the cam is at least 2 cams too big to have any hope of running right in any motor smaller than a 400
Maybe some other things too, but I suspect all of them have something to do with a very bad cam selection, a total mismatch for TPI in every possible way.
Junior Member
Joined: Oct 2003
Posts: 39
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From: Houston
Car: C-20
Engine: 260 boat anchor Mexican 350 (crate) TPI (MAF)
Transmission: THM-400 I turn 3500 (which is where my pos engine's power starts droping off) at 80 I need a 4L80-E
try changing your idle to 2500 rpm's that should help. 
:lala:
:werd: Thread Starter
Member
Joined: Sep 2002
Posts: 182
Likes: 0
From: Louisville Kentucky
Car: 1991 Pontiac Firebird
Engine: 3.1 V6
Transmission: 700R4
well. I think that I will just change the cam shaft instead. I've got a cam with 443/465 114 that I'm going to put into this instead.
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Thread Starter
Member
Joined: Sep 2002
Posts: 182
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From: Louisville Kentucky
Car: 1991 Pontiac Firebird
Engine: 3.1 V6
Transmission: 700R4
Help!! I've just put together a 5.7 with a crane cam 280H series, actually a blue racer cam wg-1159, and I can't get the car to start or even to fire! I've checked the timing chain, timing marks, distributor, valve adjustments, everything that I can think of, can anyone help? I just changed from the XE294H cam as I thought that was the problem, too much cam, but I'm having the same problem with the smaller cam..
specs are adv dur 280/290 .050 dur 214 224 vlv lift 443 465.. so not a really big cam, but I'm having lots of problems getting to to run.
thanks
dale
specs are adv dur 280/290 .050 dur 214 224 vlv lift 443 465.. so not a really big cam, but I'm having lots of problems getting to to run.
thanks
dale
Supreme Member
Joined: Jul 1999
Posts: 18,457
Likes: 16
From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
Make sure the rotor is pointing to the #1 plug terminal when the engine is at #1 firing. Don't forget there are 2 instances of #1 TDC during one complete engine cycle; on;y one of them is #1 firing. The other is at the end of the exhaust stroke and beginning of the intake stroke. Find which one is #1 firing by compression in the #1 cyl.
When you installed the timing chain, if you did it "dot to dot", that is the other instance of #1 TDC. Perfectly valid for building of course, but not #1 firing. From that point, you'd need to rotate the crank exactlyt one complete revolution, which will put the dots both at 12:00; that position is #1 firing.
When you installed the timing chain, if you did it "dot to dot", that is the other instance of #1 TDC. Perfectly valid for building of course, but not #1 firing. From that point, you'd need to rotate the crank exactlyt one complete revolution, which will put the dots both at 12:00; that position is #1 firing.
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