PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Idle and start up problems. please help.

Old Sep 11, 2006 | 09:03 PM
  #41  
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I could open the throttle screw up a little so it starts better but then the IAC counts would bottom out at idle and it would surge.
That is my main problem. its like a catch 22. if it gets enuff air to start right up then it gets too much air to idle. if it gets enuff air to idle right it doesn't get enuff air to start right.
The problem (i think) is that my converter is too light. its a tiny 8" converter that hardly weighs anything so it takes very little air to keep the car at idle. That and everyone i've talked to says that 98's are harder to tune.
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Old Sep 11, 2006 | 09:09 PM
  #42  
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I have found that 98s are harder to tune as well, but I've adapted a lot of the 2002 settings into my tune which has helped significantly. Adapted the ones that made sense at least, while doing a manual comparison between stock 98 and 02 files.

I received your files and am taking a look at them.
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Old Sep 25, 2006 | 02:06 PM
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Any leads yet? im having almost the same issue. Got the RAF dialed in, the VE table is 0/-2 at idle, timing is at 22* When I go to start the car the RPM will jump up and down till it warms up then it will catch a steady idle. You turn the car off then try to restart its a PITA, it will almost die and the RPMs jump up and down again for a min or so. I drilled the TB pretty good size and it would start fine then but like you said the IAC would bottom out at 0 then cause issues. You add more the the RAF and it helps a little but not much. Ive seen a couple things people have mentioned in here Im going to try later on. Its really annoying when your out and about and the damn thing wants to act all crazy when you start it. When you do figure it out, be sure to post up. Good luck....
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Old Sep 25, 2006 | 10:38 PM
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I went M6. starts and idles great now.
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Old Sep 25, 2006 | 11:04 PM
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m6 as in tune or as in you went to a m6 in the car?
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Old Sep 26, 2006 | 07:48 AM
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Originally Posted by SUX2BU
I went M6. starts and idles great now.
HAHA what a simple fix...

I believe Ive got mine somewhat nailed down. I played with the IAC effective area, as well as the Start up Airflow tables. I can start the car and the RPMs jump to 1200-1300 then slowly go lower to 900-950 where it will stay. This is fine with me as long as the RPMs are jumping around like crazy..
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Old Sep 26, 2006 | 04:05 PM
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Originally Posted by ninobrn99
m6 as in tune or as in you went to a m6 in the car?
M6 in car.
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Old Sep 26, 2006 | 04:27 PM
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That thing should get some real good mileage with a m6 and 31's
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Old Sep 26, 2006 | 10:03 PM
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Originally Posted by SPEEDYws6
That thing should get some real good mileage with a m6 and 31's
i actually took off the 31's today and put on some 295/50's. It's fun as all hell bangin gears again. Can't wait to see what it dyno's.
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Old Sep 26, 2006 | 10:27 PM
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its not gonna be as quick as it was with the stall will it? oh well, you're still gonna have fun with it on the street
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Old Sep 27, 2006 | 09:09 AM
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Originally Posted by ninobrn99
its not gonna be as quick as it was with the stall will it? oh well, you're still gonna have fun with it on the street
If he can drive it will be faster...
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Old Sep 27, 2006 | 04:20 PM
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Originally Posted by SPEEDYws6
If he can drive it will be faster...
Yes i can drive.
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