crashnscar

iTrader: (2)

As the title says, I'm having a hell of a time getting this swap running.
99 Camaro LS1 swapped into a 1990 Mazda Miata (stripped race car)

You can see my previous threads regarding this issue here (most recent first):
https://ls1tech.com/forums/conversio...art-issue.html
https://ls1tech.com/forums/conversio...-h-ground.html
https://ls1tech.com/forums/conversio...pcm-issue.html

Occasionally it will fire and idle, but its very hard to get it to do that. Once you give it any throttle after idling, it dies immediately. Logs of starting it are attached.

RPD_Vette84

iTrader: (30)

too bad you werent closer. im bout to be starting a miata swap for a buddy so itd be nice for me to see some of the stuff.

who did they wiring?

when the rpms rise are you givin it gas? cause theres no TPS response.

crashnscar

iTrader: (2)

Stock 99 Camaro wiring harness.

Where are you seeing RPM rise? It never does.

RPD_Vette84

iTrader: (30)

according to the logs you posted the rpms go up to like 2,000 rpms at one point

crashnscar

iTrader: (2)

Highest it goes in the logs is 1004 rpm, mostly in the 900s while idling.

XpEdItIoUs

iTrader: (44)

Maf is unplugged in both logs can you get it to idle on with it plugged in?

Slo_240sx

iTrader: (17)

I could get it running in a day if it were in front of me.. or atleast pinpoint the problem. Sorry I can't read your logs, if you send me the software or take a screenshot and send it my way, I'll take a peak at it.

Whats the IAC and engine temp cold reading? I've seen stuck IACs cause this. Also have seen bad engine coolant temp sensors reading ridiculously low temps (-48F*) cause a no start/no rev, due to fuel dumping for cold enrichment. Whats with the MAF being unplugged?

What scares me the most about this is the fact that you back feed the chassis battery voltage. Once you apply + voltage to the ground side of electronics, its more than likely that you fried the PCM/sensors in one way or another. I would try a donor pcm and start ohm'ing out the sensors. Also check that the ground is connected on the backside of the cyl head.

crashnscar

iTrader: (2)

I don't believe I have been able to; I have tried quite a few times with many different combos of MAF, O2s, and cam sensor being unplugged/plugged in.

If you want to come spend a day with me this weekend and get it running, I'll pay you. Just let me know.

Engine temp was 72* with an intake air temp of 64*. MAP sensor reads correctly at 100kPa with engine off, about 32kPa when idling. Can I look at or log IAC opening %? I don't see it in my current logs.
MAF is unplugged because everything I have read says you don't need it, and that's the way I've been able to get it fired.

The backfeeding voltage was caused by the grounding spot still having some paint on it and not getting a good ground. That is all fixed now and it appears all my sensors are reading correctly. I do have the ground on the back of the cylinder head, have a ground from the drivers side of the block to the chassis, and a ground from the passenger side head to the chassis.

Slo_240sx

iTrader: (17)

I'll see if I can get a day in the weekend to come up there, its a long haul for me from SD. I had a similar issue with it not being able to rev past 2500 with out the maf being uplugged. It was causing the pcm to go into limp mode and then it would allow it to rev. My old boss who was my tuner at the time said that "boost management" setting was set on and he turned it off using LS1edit. I'm not really sure what that is tbh... Also, is your maf on correctly? I'm pretty sure they are directional.

crashnscar

iTrader: (2)

Ressurecting this thread from the dead, but it turns out the ECM (9354896) that I bought from SpareECM on eBay (after I fried mine) did not actually have a tune on it. I brought the car to a local LS shop/tuner and they got it fired easily by loading a good map.

I will not do business with SpareECM again.