383ss

iTrader: (14)

the PE table stops at 7200 on my 99 PCM. is the any way around that or is another year have a higher rpm limit??

my limiter is at 7200 but it STILL goes higher than it sometimes and goes VERY lean. like 19:1

383ss

iTrader: (14)

come on' I almost positive some guys rev past 7200 with a stock pcm. how do you do it?

Ping King

iTrader: (20)

i thought it was 8k

Blacker

iTrader: (3)

Mine is a '98 and goes up to 8,000 rpm

horist

^^^ where are you looking? I just checked a 98 bin and PE is still 7200

VE goes up to 8000 on all years... you should be able to use VE to compensate for the lack of PE adjustments (I believe it stick w/your last PE value, so for 7200+ , make those cells at higher MAP (100 +/-05) more efficient... (higher number = more fuel added)

Now... that 19:1 AFR you sure that's right? or is that occuring between shifts momentarily? It shouldn't be going that lean... it should at least use the last PE value I believe... unless you VE is way way off it shouldn't be commanding it that lean...

Is that 19:1 commanded AFR or what you're detecting? if it's what you're detecting i'd check to make sure your injectors can keep up and aren't at 100+ duty cycle (can't keep up w/the revs) also I'd check to make sure you're not just seeing an AFR between shifts .... 19:1 AFR with 100kpa map i'd imagine you'd hear some bad noises...

383ss

iTrader: (14)

I was judging off the PE when it stops at 7200. that is the info I was looking for, I didn't realize it would revert to the VE after that. still not quite sure what is going on with mine though. LTFT's were 1 and when it hit the MAP95-7200rpm+ cell, a/f shoots to 16.2 and then 19.9. this is read with an LM-1 with HPtuners.

looking at my VE table... MAP 95 @ 6800 is 83, at 7200 is 83, at 7600 is 81, at 8000 80.

this is what happened. I went to shift to 3rd and the clutch stuck to the floor. TPS went to zero then to 100 as the clutch was stuck, rpm to 7400 and a/f went to 16:1 then 19:1. let off the gas, A/F went down then spiked again. bliped the throttle again and the clutch grabbed and A/F was normal.
if that makes any sense

guess you could probably explain that by between shifts, but it still freaked me out. I have a melted piston also, so on my rebuild I want to make sure this isn't a problem.

horist

oh so the RPMs shot up while the clutch was down? In that situation I'm not sure how the PCM works... that'd be like free revving it in neutral... no load so it doesn't use PE.... hmmmm.... i wonder if anyone can chime in exactly how that works?

Dave F

PE just adds fuel on top of the primary tables, so I agree that you just need to fatten up your high VE or MAF cells. I still haven't figured out which ones have priority, but one of them will work.

I rev my race engines to 7500, but the OEM rods are only good to 6900 (01-up), 6500 (97-00)