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tryign to do first start, problems

Old Oct 29, 2008 | 10:39 AM
  #21  
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any ideas guys? I'm thinking maybe a short in the coil pack harness or a problem with the crank sensor
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Old Oct 29, 2008 | 10:44 AM
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maybe some thing worng with you TSP sensor since you need to hold the throttle to get it to fire?
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Old Oct 29, 2008 | 10:51 AM
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do you mean tps as in throttle position sensor? it seems to be reading correct in the scanner is the only reason I had not been considering it

for some reason the engine doesn't start trying to fire on my first attempt to crank, it usually takes about 3 tries, holding the pedal, cranking for what I consider an excessive length of time (sometimes up to 10 seconds)

could it be a ground? I have 3 grounds to the rear of the head and one to the battery terminal itself, engine is grounded to battery which is also grounded to the chassis
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Old Oct 29, 2008 | 10:53 AM
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oh for what its worth I am getting 1 code but its for "L terminal generator" iirc, its something to do with the alternator

my plug was cut for it so I soldered a new one on, just 1 red wire
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Old Oct 29, 2008 | 11:05 AM
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yes the throttle position sensor..have you tried a crank sensor relearn?
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Old Oct 29, 2008 | 11:06 AM
  #26  
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or even a IAC motor relearn? The IAC would cause it to not want to Idle. I have a freind that was having Idling problema after his tune and he got to messing with it. We found that the IAC was not moving real smooth so he cleaned it(not recommed by most) after the clean it would not idle so we got to looking and found how to re set to IAC and it was much better then. I know that will not help your fire problem but it maybe another issue. I would try the CS re Learn and see what happens.

Last edited by 72chevelle6.0; Oct 29, 2008 at 11:26 AM.
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Old Oct 29, 2008 | 11:28 AM
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Did you work the harness yourself?

I can't see a engine ground being an issue, mine has very minimal grounds and it fires right up. Possibly somewhere in the harness ground.
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Old Oct 29, 2008 | 12:17 PM
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tried to crank sensor relearn but since it won't idle I can't really do it properly, going to try resetting the other sensor you mentioned so it might idle then
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Old Oct 29, 2008 | 02:36 PM
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Ran it again this time for about 4 minutes, got everything warm up to 194 trying to get the cooling fan to kick on

now i have code P0155 Heater Bank 2
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