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Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 05-09-2008, 01:14 PM   #91
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Who said anything about tuning?

I was wanting to scan it to see what is going on
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Old 05-09-2008, 01:24 PM   #92
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Just to confirm the big things:

Oil and coolant level and condition are fine. No ingestion.

Exhaust doesn't smell rich. Engine runs good and smooth, no knocks, clunks, or hiccups.

I wish I could tell you more but I'm kind of in the blind.
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Old 05-09-2008, 07:35 PM   #93
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Today I helped my friend move, was about a 200 mile trip with a lot of hills. Car felt really pokey going up these hills and even worse accelerating from a low speed or from a stop. Otherwise the car ran great, I am just having to plant my foot a lot more than I should have to. I don't think it'* my perception, I NEVER got the impression that I was pushing the pedal down a lot more than the car was giving me in response right after the PLIM. Now it just feels like it'* out of breath...which I know isn't the case. Throttle response is just pretty poor.

Top gear acceleration at highway speeds is the least affected, but I can still feel it.

Could I be dealing with a really aggravated case of torque management? I can't see how I could be having KR and poor throttle response after the intake, which, if anything, should have lowered KR and improved throttle response.

Just throwing the idea out there, I'm kind of at a loss as to where to go with this. And unable to do much about it, since I will be out of town away from my car for the weekend, not by my choice.
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Old 05-09-2008, 10:39 PM   #94
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you could try to clean the maf sensor. i recently did that to my L36 which had the same symptoms as you described. it worked great. use the crc cleaner thats specific for maf sensors.
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Old 05-10-2008, 01:33 AM   #95
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I was actually thinking that. Would automotive electronics cleaner work ok? I'll try that when I get back.

I'm thinking of picking up a scantool if that doesn't work out.

EDIT: I've been doing some searching.

If cleaning the MAF doesn't work, I'm going to try:

1) disconnecting the MAF and driving (checking for a bad sensor)

2) replace TPS (mine is a cheap autozone part). I've had some slight surging problems at 2000 rpm when the engine is cold that I think is attributable to this, but it'* never seemed to be an issue...

3) IAT sensor. Someone had a corroded IAT sensor that improved hesitation when replaced.

4) Coils. I have a slightly rough idle at random so they may need to be replaced anyway.
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Old 05-10-2008, 12:03 PM   #96
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if you already have the electric contact spray, and you dont want to buy maf cleaner, then you should be fine. but if thats not the case, they are about the same price, so i would suggest the stuff that is meant for the maf.
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Old 05-10-2008, 03:15 PM   #97
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Yeah, it'* that I already have it and I'm kinda lazy about picking stuff up...

Though, it looks like I'm going to have to go to Autozone anyway to pick up some torx wrenches to remove it with, so might as well pick that up while I'm there.

I'll get that done tomorrow afternoon when I'm back from Florida and I'll post my results. Gotta do something about how pokey this car is.
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Old 05-11-2008, 08:09 PM   #98
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My car is back! Cleaning the MAF sensor fixed the problem. It didn't seem like much at the time, but I got a little bit of black gunk off the MAF sensor and my performance improved. It was able to get up hills and accelerate at highway speeds much better now.

My theory is that upon putting on the Intense FWI, excess oil from the K&N filter got blown onto my MAF sensor, causing the reduction in performance. I'll probably take it off and clean it again in a week, but hopefully the excess oil should be gone soon.

The FWI is great by the way...it improved my exhaust note and makes nice noises of it'* own. I haven't really let the car stretch it'* legs now that the sensor is clean so I can't report on the performance difference, but from the sounds of things it must be doing better.
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