LS3 swap giving me a few headaches
Th battery was changed to a 750cc cold crank when the texas speed ls3 and t56 magnum where swapped into the car. it would turn over then die and continued to turn over then the engine would cut off. Each time we turn on the car it basically needs a remote jumper cable to spark the battery in the car. everything else including the faulty gauges in the FD have been corrected and a hollyefi was installed in the dash to combat the issue with the old instrument cluster in the car. what could be the culprit here? I'm thinking potentially the alternator?
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any hints leading to a conclusion, that would get the car back on the road would be greatly appreciated hahaha:hah::crackup:
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Need more details man, can't even really begin to understand the problem from what you provided.
Are you able to get it started and idling or not? |
Originally Posted by Wompa164
(Post 12519831)
Need more details man, can't even really begin to understand the problem from what you provided.
Are you able to get it started and idling or not? |
Don't forget that as a group we're a little bit rotarded when it comes to piston engines.
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sounds like a bad side seal
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does the engine run with jumper cables connected to another vehicle?
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Originally Posted by Veilsideride90
(Post 12519854)
something in the FD has to be consistently drawing power for it to constantly die. my guess is the alternator is bad in the car. They are only 150$ to change out so not that bad if its the issue.At this point should consider using a tachnnometer on the car?
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Originally Posted by Wompa164
(Post 12519831)
Need more details man, can't even really begin to understand the problem from what you provided.
Are you able to get it started and idling or not? when the key is in the ignition, the car will start up and then turn off. I did some research on ls swaps and they often point to it being a issue with the PCM on the engine(a common ls swap problem). The guys who are ironing out a few of the issues on the car for me corrected a few things on the vehicle. 1. a new battery was purchased and installed 750 cc 2. the wiring on my 93 fd rx7 was redone. 3. a Holley efi took the place of the faulty gauges on the car. 4. the engine was checked and is in great condition. |
You may receive more experienced swap diagnostics from norotors.com
Will the car continue to run with jumper cables attached? If your fuel pump is running then most likely an electrical issue. I doubt it is PCM/ECM related unless VATS is not turned off. Could be starting circuit or ignition switch. |
Originally Posted by books
(Post 12519919)
does the engine run with jumper cables connected to another vehicle?
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I think your first post indicates a likely culprit....the alternator; especially since it dies once the cables are removed. If you don't want to buy a new one, pull it off and have it tested at a local parts store.
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