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78SWB

Money Pit
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My ‘88 K5 will sometimes fall on its face when the engine is cold, starting from a stop. It also feels under powered. It will sometimes miss fire then randomly come out of it and run great for a few seconds then goes back to running okay. Once it’s warm it usually runs okay but seems like it’s under powered compared to my ‘87 V20. I’ve replaced the fuel filter, plugs, wires, and egr valve. Anyone have any ideas?
 

jekquistk5

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My ‘88 K5 will sometimes fall on its face when the engine is cold, starting from a stop. It also feels under powered. It will sometimes miss fire then randomly come out of it and run great for a few seconds then goes back to running okay. Once it’s warm it usually runs okay but seems like it’s under powered compared to my ‘87 V20. I’ve replaced the fuel filter, plugs, wires, and egr valve. Anyone have any ideas?

tunerprort and odb cable. Log and you will find what the issue is. Unless you have lost some compression.
 

78SWB

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Seems to be running noticeably better now after replacing the cap and rotor. Not 100% though. Rotor was stuck on so bad it broke coming off.

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