KR elimination

[superchargedSSEi]

My gut feeling is that if your WOT timing was advanced 2* instead of 3* you'd be KR free right now. These motors are kind of touchy to timing changes. A while back I was running KR free on a 3.2 pulley pushing 12psi with the timing advanced 3*. When I bumped the timing up by one more degree I started seeing KR at 8psi and saw 2-4 counts when I hit peak boost.

[Allmachtige]

Not trying to hijack, but is there a techinfo on proper injector o-ring replacement and cleaning?

[99ssei]

is it possible that the knock your sensor is seeing is false from the trans?

I have no clue. Not sure what the symptoms are or how to even diagnose that.

[99ssei]

The cat could have been the problem all along.

Just curious, how can the cat cause KR?

[2000Silverbullet]

If the Cat becomes clogged and restrictive, it will cause KR.

[99ssei]

SLP high-flow cat should arrive tomorrow, having it put in Thursday or Friday. Will update everyone with results.

[99ssei]

SLP cat in.....still KR. WOT 0-1 KR up to 4K rpm, then near 5K rpm, between 2.3 - 3. When cruising at 45 mph then nail the gas, KR hit 5.

[superchargedSSEi]

Have you done a WOT fuel pressure test yet or are you still just planning on replacing the pump?

My bet is still that the timing is advanced a bit too far. Is there anyone in your area with a tuner that can back it off by a degree or two to see if that fixes the problem?

[99ssei]

Have you done a WOT fuel pressure test yet or are you still just planning on replacing the pump?

I haven't done the WOT test yet, however, because the gas gauge isn't working correctly, I should have pump/sending unit replaced anyway.

My bet is still that the timing is advanced a bit too far. Is there anyone in your area with a tuner that can back it off by a degree or two to see if that fixes the problem?

There's a guy a buddy mentioned to me who has a laptop and a program that can flash my PCM, but we don't know if his program is compatible with Intense's flash. Basically, he has pre-set performance levels based upon the mods and he returns it back to stock, then loads the new file. Hoping someone close to me reads this and offers some help

[BillBoost37]

I'm sure it was mentioned and I missed it. Did you do a case learn with the new pcm?

[99ssei]

I'm sure it was mentioned and I missed it. Did you do a case learn with the new pcm?

Yeah, paid the dealership $120 to do it when I got the PCM a year ago. I tried doing another one through the scangauge about a week ago. No changes.

[Allmachtige]

I'm starting to think I'm in the same boat as you. I'll be replacing some of my vacuum fittings/lines when the dealer gets them in and report back, but something tells me it wont help.

Tonight I'm going to remove my V-volt booster and see what happens on the drive tomorrow.

[LeSabre in Buffalo]

Just my .02, but is there a way to download the tune on the PCM, mess around with it some, then re-upload?

Or sending it back to Intense to have the timing set back to normal levels?

[99ssei]

Just my .02, but is there a way to download the tune on the PCM, mess around with it some, then re-upload?

Or sending it back to Intense to have the timing set back to normal levels?

Suppose that's possible, however, I don't have original PCM. Sent back in for core. I'd be out of a car for 3 days (this is my only car). Going to replace fuel filter and see if the one put in April was the issue. Since I need to replace the sending unit, I'll get that done and while I'm there, replace the fuel pump just as a precaution. Theoretically, I shouldn't have to go back in the tank for another 100K miles.

Side question: at what point is a high performance pump needed? (more than the factory unit can push)

[superchargedSSEi]

The factory pump's limit is probably around 300whp or so...same as the stock injectors. If you have more mods planned in the future go ahead and upgrade to be on the safe side.

[99ssei]

I think I might've found my KR problem. I didn't have the correct W-body dipstick tube (bought one for a 00 GTP), so the tech bent the factory H-body so it will fit. Tomorrow morning, I'm going to see if a local dealer has one. I'll hold off on replacing the sending unit until this is done to see if that's the problem.

[LeSabre in Buffalo]

So that photo is of the dipstick up against your headers? Can't really tell what it's rubbing against. But yeah, get that taken care of. Rubbing's bad, mmkay (said in Mr. Mackey voice).

Or get the false knock elimination kit? How long since your transmission has seen new fluid and a new filter?

Or see if there's a junkyard PCM for cheap your friend's buddy can play around with?

IDK, trying to brainstorm at 1:20 AM doesn't work so well.

[DaBlackPearl]

This is a great thread.
I see you pumped some $$$ into many things thru out this process. Yet, you really do not want to change the Feul pump and sending unit. I would change it out just to have piece of mind that I knew I had the right feul pressures, but that's me.(also would know how much gas I have! LOL)

I am waiting to see what takes the KR out.

[99ssei]

Had the SLP high flow cat put on last week. Still KR.
Today, I had new flex pipe put in (verocious) to take out the nasty ticking sounds (sounded like an exhaust leak, but was the flex pipe - see http://www.pontiacbonnevilleclub.com/fo ... 410#p40410).
Also had them put in the 99 GTP dipstick. I'll have to do a close inspection tomorrow night to see if the tube is touching. I didn't get to drive the car from from the shop (about a mile to the house) I was doing 30 and jammed it and saw KR jump but didn't get to see what it hit (annunciator triggers above 2.0). I'll watch it tomorrow and report back.

This is a great thread.
I see you pumped some $$$ into many things thru out this process. Yet, you really do not want to change the Feul pump and sending unit. I would change it out just to have piece of mind that I knew I had the right feul pressures, but that's me.(also would know how much gas I have! LOL)

I bought the TRE-340 255lph fuel pump and the sending unit from GM (which is scheduled to be delivered on the 5th).
Going to throw that in next.
Also going to change out the front trans mount with a Boostie modified one!

[Allmachtige]

Let me know how the fuel pump and such works out.