My TBI 1991 305 does not fire when cranking. Until the battery starts going dead. Which is then turning over at a slow revaluation. But it's still yellow (no fire). Is it my pick up coil? Or timing?

Asked by Torkerjr Feb 28, 2015 at 07:06 AM about the 1991 Chevrolet C/K 1500

Question type: Maintenance & Repair

Swap ECM/PCM COMPUTER.
Sense I'm going to a 305. From a
350. Or just wire a knock sensor into
the original ECM.

103,655

Reelin68 answered 9 years ago

If you have your original 350 ECM, you will have to get a compatible ECM for your 305.

Mark helpful

Justin answered 8 years ago

Same ecms a 305 will run off a 350 ecms and vise versa. First off while cranking is the injectors spraying fuel. If not then pull the cap off the distributor and remove the little sensor that's held with 2 bolts. Then get a new one problem solved

Mark helpful

Your Answer:

My TBI 1991 305 does not fire when cranking. Until the battery starts going dead. Which is then turning over at a slow revaluation. But it's still yellow (no fire). Is it my pick up coil? Or timing? 1 Answer

Swap ECM/PCM COMPUTER. Sense I'm going to a 305. From a 350. Or just wire a knock sensor into the original ECM.

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Swap ECM/PCM COMPUTER. Sense I'm going to a 305. From a 350. Or just wire a knock sensor into the original ECM.

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My TBI 1991 305 does not fire when cranking. Until the battery starts going dead. Which is then turning over at a slow revaluation. But it's still yellow (no fire). Is it my pick up coil? Or timing?

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My TBI 1991 305 does not fire when cranking. Until the battery starts going dead. Which is then turning over at a slow revaluation. But it's still yellow (no fire). Is it my pick up coil? Or timing?

2 Answers

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