Cascade Crew

fiveoformula · Posted: Tue Jul 27, 2010 3:34 pm Post subject:

Thought I'd bring this back up for descusion...
So I have a totally new bin on a 512 chip now. I toasted the stock chip I guess because it won't work, the car runs pretty smooth but even with a totally new chip, Im still getting the pop in high RPM's (sometimes). For kicks an giggles I tried taking the air filter off and driving around today and it even popped this time with no filter. Confused

I have been trying to get a grip on tuning for less fuel but I have been unsuccessful so far.
I also don't have a way to datalog since theres something wrong with my laptop's battery and it won't power up unless it's plugged in to a wall.
Im kinda thinking this is a mechanical issue seeing as it has the same problem with two chips, but then again its still fat rich. opinions? lol

Twilightoptics · Posted: Tue Jul 27, 2010 4:34 pm Post subject:

Two chips... but are you using the stock bin for your car? Or another one on the burned chip?

When it pops, what does the WB say?

I forget, intake pop or exhaust pop?

aaron_sK · Posted: Tue Jul 27, 2010 5:58 pm Post subject:

Al Hasse · Posted: Tue Jul 27, 2010 6:33 pm Post subject:

fiveoformula · Posted: Tue Jul 27, 2010 9:22 pm Post subject:

fiveoformula · Posted: Tue Jul 27, 2010 9:26 pm Post subject:

Good call on the inverter, I can't believe I didn't think of that. I will have to get the cigarette lighter working too lol

aaron_sK · Posted: Tue Jul 27, 2010 9:58 pm Post subject:

fiveoformula · Posted: Tue Jul 27, 2010 10:05 pm Post subject:

Thats what I thought, Marc and I were talking, thinking that maybe it's so rich because im running the TPI fuel pump?

Dewey316 · Posted: Tue Jul 27, 2010 10:18 pm Post subject:

pump wouldn't matter, unless you had a bad regulator, or the return lines was a restriction.

I'm running a TPI pump in my car, going on 5 years, its never been an issue.

fiveoformula · Posted: Tue Jul 27, 2010 10:33 pm Post subject:

Yeah, I thought that most people who used it didn't have an issue, and the regulator is fairly new since I rebuilt and cleaned the throttle body about a year ago. Is that TPS voltage a bit on the low side?

fiveoformula · Posted: Tue Jul 27, 2010 11:38 pm Post subject:

I have been reading up on TGO about fueling a little bit. Is it the BPW constant that I need to adjust to lean it out a bit? or is that only going to effect Idle?

Twilightoptics · Posted: Wed Jul 28, 2010 6:45 am Post subject:

THe BPW costant IIRC for TBI is bascially telling it the Injector Size for laymans terms.

If you adjust that, it changes fueling EVERYWHERE.

Kinda wonder if you have an intake valve on it's way out. Since your valve seals are shot and have been for so long, deposts can get in there and cause it not to close. That could also cause your intake backfire.

fiveoformula · Posted: Wed Jul 28, 2010 9:05 am Post subject:

I hadn't thought of that, but I suppose it's possible, I actually got around to changing them a few months ago, every cylinder had good leakdown from what I remember. I still have never done a compression check though, just because I know how much of a pain it is on our cars. Embarassed

Twilightoptics · Posted: Wed Jul 28, 2010 9:23 am Post subject:

Leakdown is no easier than a compression test? Same fitting in sparkplug hole Confused

fiveoformula · Posted: Wed Jul 28, 2010 11:22 am Post subject:

I know but, I happened to have the leakdown kit hooked up to fill the cylinders with air when I did the seals.

Twilightoptics · Posted: Wed Jul 28, 2010 11:35 am Post subject:

Were you popping then?

Leakdown is the best representation of the chamber sealing.

For shizzle in gizzzle. Retard the distributor 6 degrees and go see if you can get it to pop. Popping out the intake is too advanced timing, or lean, or an intake valve. Don't suppose you got a rocker a bit too tight when doing the seals? You could have the possability for high oil pressure under high rpm, that causes the lifter to pump up a little bit and hang the valve open if it's set too tight. Mike ran into this, but this was with aftermarket parts. Very rare to see it on a stock rig. That's why I always tighten the rocker down <1/4 turn.

It is possible, however, that if you're pegging the WB rich, that the plugs can either foul and or not spark all the time from excess fuel... in which case can pre-ignite in later rpms at the wrong time.

fiveoformula · Posted: Wed Jul 28, 2010 12:24 pm Post subject:

Now that you say that, I think maybe I did adjust the rockers to tight. I don't know if it's accurate but my oil pressure gauge has been doing some funny things since then too. Can that have done some damage over-tightening them? or can I just re-adjust the valves and it should be good?

I can't remember now if it popped before I did the seals...

Mangus · Posted: Wed Jul 28, 2010 8:30 pm Post subject:

fiveoformula · Posted: Wed Jul 28, 2010 9:37 pm Post subject:

At the risk of sounding really dumb, which tables are those?
It's the $4D mask

Mangus · Posted: Wed Jul 28, 2010 9:38 pm Post subject: