Thread: Question about LTFTs

Just got done installing my WBS intercooler on the car. I ended up deleting the EGR and I am currently still running a stock PCM. (I've got an Intense tuned PCM ready to go in once I get my injectors)

At idle with the engine cold, LTFTs are around -15 to -16.4 bouncing around between those two values

At idle with the engine at operating temp, LTFTs stay around -10 to -12.

Normal driving they bounce between -5 to -11

Cruising at 60mph it will stay around -10.5 to -11.1

WOT stays at 0


No vacuum leaks, no exhaust leaks.

STFTs stay between -2 to +3 at all times, and stays at 0 during WOT.


My question is; Are my LTFTs wacky due to the EGR delete, or is there possibly something else going on?

you're running rich.

It might not be a huge vac leak, but it's possible with the IC.

Those are some pretty beefy trims, lol.

Are the MAF tables correct (i.e. matching year MAF/TB)?

I know I'm running rich.

Vacuum is between -22 in/hg to -19in/hg fluctuating with the rpms.

PCM is stock. Not been messed with at all. Running a stock L67 MAF and TB.

the intercooler is giving you a lot more headroom with the fueling and the stock tables are way off now. you're running rich.

He is cammed, I blame that for the fuel trim problem.

Makes sense.

Time to run around with the slowest cammed/intercooler setup ever, yay.

Originally Posted by Fivefingerdeathpunch

He is cammed, I blame that for the fuel trim problem.

LTFTs were no where near that far off with only the cam. Cruising they would stay between -1 and +2.

My XP car idled between -15-17 in/hg~.

That's not too far off, but yes...stock car idles around -20~ give or take one or so. Cam doesn't make THAT much of an impact.

It needs tuned too. Get wideband

Until then, throw on a 2.8" and let me race you in a really slow car.

Also, what about an exhaust leak? How'd you seal the IC? Is the PCV working?

Wideband is currently at AEM getting repaired under warranty. Should be back next week.

Squidy McSquiderson.

Answer my questions, I edited my post.

But I like my 3.8 pulley. We've been together for so long.

Car had an exhaust leak at the crossover. Got it welded and no more leaks.

IC is sealed with RTV, top and bottom.

Breather on the front, PCV is working fine for the rear.

I thought breather was there for non-working PCV?

Put the oil cap back on for S&G's.

Have pictures




Though I had a good pic of the PCV setup. Drilled and tapped the brass plug in the TB, got that running to the Gen V PCV port.

Operation ****s and giggles is on. Be back in a min.

God ****ing damnit.

**** YOU SQUID.

Go take the JB weld out of that case you nub.

Let's play guess what's wrong with the GM!!

IT'S THE BEST GAME.

eva.

I'm terrible at it