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TPI backfire issues need some help

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Old Apr 19, 2009 | 09:34 PM
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Killerzracing71's Avatar
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TPI backfire issues need some help

Im lost.

I used a the tune that I had for the TBI motor (changed it for port by changing 2 options in EBL)

When I first did the swap the motor wouldnt stumble or hesitate at all when it reved up.

Now after I put the TV cable on and went for a drive the car ran like pure mess.

Now its to the point where it wont rev withought backfiring.

On thing ive noticed is my timing appears to be way to low when I hit the throttle.

Im wondering one of two things.

My port that I used for the Map sensor not sure if its the right spot.

Second is the IAT is dead I have a CEL and its showing 104f Raw fail safe number and it stays there. Will that cause that much of a problem by saying the IAT is higher then it realy is.


Are my injectors dead, what about the pressure I have in the lines.

I know how to check the pressure (fuel pressure gauge LOL)

But the injectors?

Any other ideas?


I didnt change anything except fuel delivery, so I belive thats the problem the timing table that worked on the TBI should work on TPI right?

HELP ME PLEASE IM SO CLOSE

I did a little reading I might disconect the IAC, which isnt supposed to be in there (came from my TBI, I think my IAC from my TPI is dead)
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