Fuel Injection Issues - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 01-12-2007, 03:40 PM   #1
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Default Fuel Injection Issues

Im new to this site and it seems very knowledgable on our type of cars. I have a 1993 pontiac bonneville ssei, i just rebuilt the supercharger w/ new coupler and bearings as well as the gasket from the */c to the manifold, I also did the plugs,wires and a new mass air flow sensor and a new oxygen sensor and reset the computer. when i got to start it it idles fine but when you go to drive it, it dosent accelerate and spits black **** out the exaust. im thinking its dumping way to much gas into the motor cause i drove 18 miles and went through 1/4 tank of gas. the timing is fine i checked it. when i bring it up on a computer my coolant temp sensor,MAF,MAP and air intake tepm sensor are all comming up as troubled codes. does anyone have any mechanical suggestions on what i can do to get this motor running strong again?

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kyle
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Old 01-12-2007, 03:45 PM   #2
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MAP code? The Series I PCM doesn't even see the MAP.

Assuming all the new sensors you got are correct for a 93, maybe you cracked an injector and it'* dumping a lot of fuel or your PCM happened to take a poop. Can you get a spare from a junkyard? Even if it'* not from an SSEi, but is from a 92-93, you could put your EPROM chip in it and swap it to see what happens.

What are all the code #'* that show up in the scan?
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Old 01-12-2007, 03:50 PM   #3
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i went to my local checker auto and got the codes read and the codes that came up are as follows,
23
34
44
`whatever the coolant temp sensor code is that showed too.
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Old 01-12-2007, 03:53 PM   #4
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when i did the entire rebuild i checked all the injectors and they were very clean and free of defects, they were replaced just after i got the car, with O.E. injectors
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Old 01-12-2007, 04:05 PM   #5
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Please don't post mechanical problems in General Chat.

Moving to 92-99 so the Gearheads can find this.
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Old 01-12-2007, 04:29 PM   #6
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Start off by checking to be sure that all the connectors were reconnected properly. Clean the battery cables on both ends, including removing the boots on the battery end and cleaning there. We've had many strange issues be caused by poor, corroded connections. Also, check the wiring for all the sensors that show up as a problem. It almost sounds as if one of them could have grounded itself someplace, and then dropping the voltage to the other sensors, making it appear as if they're all bad.

Another place to check is the grounding busses on each side by the front foot wells.

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Old 01-12-2007, 09:36 PM   #7
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You said you "reset the computer." What exactly did you mean by that?
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