Ls3 plug play cry conversion
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Ls3 plug play cry conversion I have just built in my Corvette 1971 a LS3 376/480 crate engine, and with plug and play kit 19201327 (pcm # 19201790)
When I start the car it has the right idle, and run and sounds well in free gear.
When I put the 400th automatic gearbox in drive (pure mechanical no sensors connected with the engine etc ) the engine stops at once (same like try to driving away with a stick in third or fourth gear)
When managed to drive away the idle get higher and engine is running around 1500 and 1800 rpm, and without using the throtle the speed become 30-40 mph
When I start to push the accelerator I miss total the promissed horsepower wich it shows in free gear, (and compare with my former old standard engine)
This is for now a problem of the second degree, but maybe it had to do with the First problem .
In the dark you can see the Mill light shines very very weak.
I bought a predator to test things, and found no problems
Communication will be a bit slow because of the time difference , so hope you will be please patient with me.
Anybody who think can help?
T.I.A
PC
When I start the car it has the right idle, and run and sounds well in free gear.
When I put the 400th automatic gearbox in drive (pure mechanical no sensors connected with the engine etc ) the engine stops at once (same like try to driving away with a stick in third or fourth gear)
When managed to drive away the idle get higher and engine is running around 1500 and 1800 rpm, and without using the throtle the speed become 30-40 mph
When I start to push the accelerator I miss total the promissed horsepower wich it shows in free gear, (and compare with my former old standard engine)
This is for now a problem of the second degree, but maybe it had to do with the First problem .
In the dark you can see the Mill light shines very very weak.
I bought a predator to test things, and found no problems
Communication will be a bit slow because of the time difference , so hope you will be please patient with me.
Anybody who think can help?
T.I.A
PC
Thread Starter
Registered User
Joined: Mar 2011
Posts: 10
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Yes proper flexplate and spacer and transmission is also O.K.
Found it complete mystery that the engine stops suddenly, while it
has not any electronical connections with aut. gearbox .
Thread Starter
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Joined: Mar 2011
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Thread Starter
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This may help.
https://ls1tech.com/forums/automatic...questions.html
https://ls1tech.com/forums/automatic...questions.html
PC
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I think that the pcm needs a signal from the VSS. You can add one using a Dakota signal generator on the speed-o cable. That's what's I used on my 350 turbo.
http://www.dakotadigital.com/index.c...rod&prd109.htm
http://www.dakotadigital.com/index.c...rod&prd109.htm
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I think that the pcm needs a signal from the VSS. You can add one using a Dakota signal generator on the speed-o cable. That's what's I used on my 350 turbo.
http://www.dakotadigital.com/index.c...rod&prd109.htm
http://www.dakotadigital.com/index.c...rod&prd109.htm
In the mean time somebody suggest that maybe the ignition fires is a bit too late.
I have a test predator, but doubt if I can make (electronical) changes on the ignition time to make it fires earlier, and would it be interesting
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[QUOTE=JJFarmer;14609764]I think that the pcm needs a signal from the VSS. You can add one using a Dakota signal generator on the speed-o cable. That's what's I used on my 350 turbo.
Hi,
Have lent and tested a dakota signal generator in the hope it was working on the pcm, while I got a 400th automatic transmission.
But without results.
Can the ignition timing be late ???
Problem: Idle 850 rpm oke but engine died at instant when I put it in drive
Hi,
Have lent and tested a dakota signal generator in the hope it was working on the pcm, while I got a 400th automatic transmission.
But without results.
Can the ignition timing be late ???
Problem: Idle 850 rpm oke but engine died at instant when I put it in drive
