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Old 09-27-2012, 07:41 PM   #1
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Default No start issue

Hey everyone. Seems the only time i post on here is when i have a problem.

Anyway the other day i had a car in a left lane try to merge into my bonneville and in the process i ended up hitting the (this was going around a right hand turn) with my front pass. side tire trying to avoid. Upon hitting the curb the car immediately stalled. i coasted in to the nearest drive way and the car restarted no problems.

Fast track a couple days later and the car would randomly cut out while driving around, but would always restart immediately. Ive been chasing this issue for a couple weeks now (replacing various parts) with no solution.

The problem ive having now is the car doesnt start at all. It will turn over but i cant seem to get the fuel pump to prime unless i bypass the racetronix fp rewire relay. Im kind of at a loss at the moment here figured id scratch your guys brains to see what ive missed.

Parts ive replaced.

cps with relearn done (new)
fuel pump (new)
swapped icms
oil pressure sending unit (got busted in half from curb hit) (new)
Im getting power to the pump, the icm and coils.
replacement racetronix relay (new)
stock fp relay (new)
all fuses check good

Picture of fp rewire relay jump.


I'm sure ive missed a couple things here.

Jay
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Old 09-27-2012, 10:00 PM   #2
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you see what wires are in that area, look for something thats pinched or chafed wires? if you get it to prime does it start
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Old 09-27-2012, 10:07 PM   #3
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Wow, that'* a tough one. My first though was CPS but you already replaced it. I wonder if you damaged the harmonic balancer and that is affecting the CPS signal. You might also want to check all electrical connections (ICM for example) to make sure you haven't jarred something loose.
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Old 09-28-2012, 01:47 AM   #4
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All wires seem to be fine. I haven't found anything rubbing or chaffing. The balancer was replaced with a powerbond unit at the same time the cps was done just in case.

The fp primes and runs with the pins jumped on the racetronix rewire and car runs and drives great like this. Though i'm pretty sure that relay was there for a reason and cant seem to find out why the pump wont prime with the relay in.

I was reading (on here i think) that the pcm needs to see a signal from the oil pressure sending unit to give a signal for the fp to prime. I replaced the sending unit is there something else i missed in this area? Wiring looks fine by the sending unit.

jay
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Old 09-28-2012, 01:57 AM   #5
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Another thought, what on the front right of the car could have shaken loose that would keep the fuel pump from priming? Loose ground maybe? Also i'm not sure how the oil sending unit got damaged. The only thing that could have remotely hit it i think is the cv shaft. Maybe there'* something else in that area that was effected too.
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Old 09-28-2012, 08:33 AM   #6
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see if you are getting a ground on the wire from the pcm and trace it back to make sure its not open
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Old 09-28-2012, 11:19 AM   #7
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The impact could affect any area. Don't just focus on the passenger side. Justin is correct ... PCM would be the next logical place to start checking things out.
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