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-   -   Newly Cammed LT1 Runs Poorly In Closed Loop (http://www.njfboa.org/forums/showthread.php?t=59609)

greenformula92 05-12-2012 09:19 AM

you could use the cigar test, or pay an hour labor to have a smoke test done, if nothing else you will know if anything is leaking and where its leaking from.

the other thing you can use is a can of throttle body cleaner to spray around the base and plenum, throttle body and where ever else you think needs to be sprayed. lines you may just have to gently feel around

1994lt1 05-12-2012 12:43 PM

I sprayed throttle plate cleaner around the runners and vacuum lines to no prevail. The code comes on now IN GEAR with brake applied. I assume its because the idle drops down so low and it sees low vacuum?

If you brake torque it in gear, the car hesitates, and pops both through the intake and exhaust. Like I said it does this when warm after warmed up. Could this be another OPTI issue?

I unplugged the MAP sensor and it seemed to run better at first but then had the same symptoms.

greenformula92 05-13-2012 09:05 AM

Try taking the MAP off and checking that little rubber donut that the nipple mounts too. Is this on a factory tune or has a tune been applied yet?

1994lt1 05-13-2012 01:59 PM

The nipple was there. It's a little scrunched up. Maybe ill try taking it out and plugging the hole and seeing if that helps. It is in tact though.

The tune has been changed. Email tune from madz28

sweetbmxrider 05-13-2012 04:16 PM

Eek, haven't run into a good experience with a tune from madz28 yet. Not saying it is your problem, just saying there isn't a good track record there.

1994lt1 05-13-2012 05:03 PM

Well I would be worried but it ran like this before the tune as well.

1994lt1 05-15-2012 07:54 AM

RESOLVED!
 
Well guys its fixed and it runs like an animal. Timing was off by one tooth...not sure how I did that. I'm just glad its right now! Thank you everyone for your help and patients.

greenformula92 05-15-2012 08:22 AM

wow and we ruled that out. how did you come about figuring that out?

sweetbmxrider 05-15-2012 08:39 AM

Yeah, I thought you also said it was doing this before the cam swap as well?

Oh well, at least its motoring now!

1994lt1 05-15-2012 09:15 AM

Noo it was doing this before the tune, not the cam. But anyway I had a good mechanic friend listen to it and he said it sounds like timing, so apart it came.

LTb1ow 05-15-2012 09:27 AM

Pretty cool stuff man, when you headed to the track with it? :)

1994lt1 05-15-2012 09:35 AM

As soon as I can. Maybe next Friday

sweetbmxrider 05-15-2012 09:43 AM

Good stuff, it definitely helps in diagnosing when you can see and hear what you are working on 8-)

1994lt1 05-15-2012 09:45 AM

Haha yeah I know. I was just asking on here for some sort of direction and it worked. Thanks again guys

sweetbmxrider 05-15-2012 10:06 AM

No definitely, I do the same. Its just tough/frustrating when you can't see or hear the car in question. Keeps you sharp at the same time though, having to consider all variables that are second nature when you are there in person.

Go race it!!!


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