shanghai_todd

iTrader: (2)

Looking for a local GM/LS1 guru that can help me with my Porsche conversion. Install is done and I need help trouble shooting the problem.

Any mobile mechanics in the Tampa Bay are interested?

See link below for more detail


https://ls1tech.com/forums/conversio...need-help.html

shanghai_todd

iTrader: (2)

Here is a reading from my scanner:

ST FTRM1 (%) 14
LT FTRM1 (%) 24
ST FTRM2 (%) 6.2
LT FTRM2 (%) 24.2
MAP (in.hg) 18.9
Engine (RPM) 800
VEH Speed 0
ING ADV (Deg) 21~24 "keeps moving"
IAT (F) 120
MAF (lb/min) 2.2
ABSLT TPS (%) 0
Second Air "Error"
O2S11 .7v 10.9%
O2S12 .4v N/A
O2S21 .8v 8.5%
O2S22 .4v N/A

shanghai_todd

iTrader: (2)

Day # 3 of troubleshooting and I have traced an issue with the spark. I used a timing light on each of the spark plug wires to see if I was getting a spark to each of the plugs and found that cylinder #4 and cylinder #7 are dead.

I swapped coil packs with know good ones and the problem still stays at #4 and #7

Not sure what to check next but think it may be in the PCM.

Any advice?

98TA6.0

iTrader: (42)

do a search. that is a very common problem with these motors.

shanghai_todd

iTrader: (2)

Throw me a hint or something.. I changed the spark plus with NGK and tried various gaps but still nothing at #4 and #7. Also have new MSD wires and have ruled them out.

common problem rhymes with?

bLuE_DeViLz28

4 and 7 are on the same circuit.https://ls1tech.com/forums/pcm-diagn...ire-2-7-a.html idk i this helps

shanghai_todd

iTrader: (2)

About to give up, I have tried multiple grounds, new plugs, checked injector and coil signals and everything checks out.

maverickmk

iTrader: (10)

Have you tried to contact some shops that program these LSx's? Mike Norris & EFI Alchemy are good ones to have a chat with, I would think. Maybe not since they haven't chimed in, but I think it would be worth a phone call. They are regulars on this section and also sponsors. I wish I could help, but I'm more old school & LT1 based. I really like the project you have there. I would like to check it out sometime when you get it all worked out. Sorry I'm not more help, but best of luck with it.

shanghai_todd

iTrader: (2)

Update: Problem Found

As I suspected I inspected the reluctor wheel today and discovered that it is bend and has several teeth that are chew'd up and mis-aligned

Any way these can be fixed without dropping the motor?

Steve01SS

iTrader: (43)

Crank has to be out of the block to change the reluctor wheel. There also a special tool needed to swap it and get it lined up right.