leaning out tune?

***SSlowBoat*** · 07-08-2017, 05:37 PM

Originally Posted by superspirit

It's easy enough to check without a teardown. pull the pcv and breather tube out of the valve covers, put a piece of tape over the pcv valve hole and squirt a lil carb cleaner in the breather hole. If it changes then it's got a leak at the intake gaskets.

you would leave pcv on side of intake connected to check this, you would plug the breather tube to tb with tape.

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**Injuneer** · 07-08-2017, 07:06 PM

Just a thought.... his LTFT's were all substantially below 128. A vacuum leak would drive them above 128. The MAF seemed to be reading too high at idle. Again, opposite of a vacuum leak. In both data logs I mentioned a potential problem with the MAF readings being higher than I have normally seen. That would over fuel it and drop the LTFT'S down.

**fullforce** · 07-08-2017, 07:56 PM

@Injuneer
thats what was confusing the heck out of me, they were reading below 128 witch would mean it's running rich. But when I added fuel it smoothed everything out witch was making me think maybe it had a vaccum leak? When I would take fuel away the computer would get closer to 128 but the jerking and poping would actually get worse.
Now is SD it is running phenomenal, gonna work on the idle at start up and leave the rest along untill I get a wideband.

**fullforce** · 07-15-2017, 03:32 PM

Put about 300 miles on the car just running open loop and it seems to be doing fine. I just spent hours trying to adjust the ve tables to get it to run correctly in closed loop and NOTHING I do makes it any better.
Cant find any exhaust leaks, all sensors SEEM to be working fine.
So my question is how bad is it on the car to be driving 100% of the time in open loop?

**Gassey** · 09-04-2017, 05:56 PM

Originally Posted by fullforce

Car has alot of surging unless there is a large load on the engine witch im trying to tune out some. Also seem VERY rich at idle. Whats the best way to try to lean it out under light load? Ive got tunerpro rt setup.
Started with a mail order tune witch obviously I knew would need some adjusting, Thanks.

I'm having a very similar issue in my car. I just put the Jet Tuner on my lap top.

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