LS Engine Idling Issue - Lateral-g Forums

ItDoRun · #1 10-21-2015, 09:39 AM

Quote:

Originally Posted by Vega$69

I would 1st look for vacuum leaks and open ports on the intake. Ports on the rear for the booster etc. also check that TB and O ring are snug.

Is the MAF sensor installed?

What have you done regarding tuning for you set up?

I checked all the vacuum/PCV hoses and they're all tight. I'll check the TBthis evening. Yes, MAF is installed. PSI did a start up tune when I purchased the ECM.

ItDoRun · #2 10-21-2015, 09:46 AM

I need to get a fuel pressure gauge installed. I'm sure there's probably some air in the fuel system as well.

**TomM** · #3 10-21-2015, 11:45 AM

The 8 volt thing is a problem. Where did you pick up the wire to the gauge? Is your alternator charging when it is running? What is your battery voltage running and static?

These engines use a lot of power to run everything, it might just be this simple...

T,

ItDoRun · #4 10-21-2015, 01:13 PM

Quote:

Originally Posted by TomM

The 8 volt thing is a problem. Where did you pick up the wire to the gauge? Is your alternator charging when it is running? What is your battery voltage running and static?

These engines use a lot of power to run everything, it might just be this simple...

T,

I need to check it this evening to see if it's charging or not.

ItDoRun · #5 10-21-2015, 01:34 PM

Quote:

Originally Posted by TomM

The 8 volt thing is a problem. Where did you pick up the wire to the gauge?

T,

I tied it into the pink 12V wire from the instrument cluster wiring.

ItDoRun · #6 10-21-2015, 01:40 PM

Static is 11.52V, so that's a problem. Since the car won't idle, I'll need another hand to check while running.

Vega$69 · #7 10-21-2015, 02:58 PM

Voltage is probably not the issue.

If you have a custom cam and ls3 top end on an LS2 the canned tune from PSI will not do the job.

You can have it tuned or data log and send the for to Mike Norris or somebody to re-tune for your set up.

ItDoRun · #8 10-21-2015, 03:44 PM

Quote:

Originally Posted by Vega$69

Voltage is probably not the issue.

If you have a custom cam and ls3 top end on an LS2 the canned tune from PSI will not do the job.

You can have it tuned or data log and send the for to Mike Norris or somebody to re-tune for your set up.

Futral Motorsports spec'd the cam for it and they're going to tune it for me on the dyno. I spoke with them today and they can go ahead and put a good tune in it now and then finalize it on the dyno in a few weeks.