Author
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Topic: Tuning problems
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Copello
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Member # 1534
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posted
ok here is the problem the car runs great but dies on decel at times and idle will sometimes surge and engine will die. All this started when new engine was put in with afr heads and e303 cam. everyone said it was a tuning problem so i dished out $475 to "BYRON" and I was to Get 30lbft og torque and 2hp and was suppost to run fine. so took car home and after the long drive home vehicle still ran like shit whats wrong?? up for any suggestions.
-------------------- 91 GT 73 RS Camaro
Posts: 1309 | From: San Mateo | Registered: Jul 2002
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section525
Sponsored by Corona®
Member # 2819
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posted
I've read from a lot of different places that after installing an e-cam the motor will have a hard timing idling periodically for a few hundred miles. I actually just installed one a couple weeks back and every once in a while it will not idle while in gear. You can imagine what a pain this is since I have an automatic. That's why I only have about 10 miles on the cam so far.
But I've heard some peoples need up to 1000 miles!
-------------------- 1996 5.0L K&N Intake, E-303 Cam, 1.6 Roller Rockers, TM Headers, Magnaflow, on 35s!
Posts: 207 | From: Chico, CA | Registered: May 2003
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Copello
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Member # 1534
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posted
Well I just raised the idle a little and it seems to be better but The reson it was lowered in the first place was because the engine ran really rough at around 1000-1200 rpm range but with turndowns on it now it is not as noticable we'll see how it goes from here.
-------------------- 91 GT 73 RS Camaro
Posts: 1309 | From: San Mateo | Registered: Jul 2002
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Sean90GT
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Member # 33
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posted
Let Byron know and have him address the issue. He'll make it right.
Posts: 543 | From: Then: San Jose, CA Now: Phoenix, AZ | Registered: Jul 2000
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chosen1
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Member # 1906
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posted
my guess (and im not an efi expert) is to try those IAC spacers that motorsport sells. i had a huge surging issue with one of my 5.0's and found that replacing the actual IAC didnt help much. with more of a high performance motor like yours, using the spacers would allow for more adjustment in the amount of airflow.
-------------------- 1967 Fastback. Should go 10's -but doesn't 1993 Cobra 2003 Suzuki SVS 1966 Coupe -For Sale
Posts: 2205 | Registered: Sep 2002
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BlueLightning302
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Member # 3974
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posted
I have about 12,000 mi on mine and it still does that every so often, but most of the time it will idle about 900-950.
-------------------- Originally Member #935
2003 Mustang Cobra - Some mods
"Well, atleast the slow one's trying!!" - Al Bundy
Posts: 207 | From: San Jose | Registered: Jan 2004
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Copello
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Member # 1534
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posted
The adjustment I made seemed to work fine. The IAC adjuster plate is what I probably need to get. The rockers were adjusted 4 times thats not the problem, and mileage doesn't affect anything with a roller cam that is the reson people use roller cams. Thanks for the input.
-------------------- 91 GT 73 RS Camaro
Posts: 1309 | From: San Mateo | Registered: Jul 2002
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1SLOWLX
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Member # 558
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posted
what did the notch dyno at?
-------------------- Built Tuff with your stuff ;)
Posts: 5231 | From: bay area | Registered: Nov 2001
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Copello
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Member # 1534
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posted
262hp 306 torque. told him he should of put a 347 in it or at least a 331, but its not my car.
-------------------- 91 GT 73 RS Camaro
Posts: 1309 | From: San Mateo | Registered: Jul 2002
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89saleen
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Member # 3083
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posted
Im fighting the same prob. with a 2031 cam. What happens when you block off the IAC, besides the codes?
-------------------- Its over Johnny-
Posts: 316 | From: Palo Alto | Registered: Jul 2003
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Stimson
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Member # 51
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posted
I'd check two things...
1) The VSS sensor
2) Your alternator/alterator power wire connections. Does your car get a full charge at idle? Loose nut on your starter solenoid? I had this problem give me the same symptoms you're having. Once was a loose nut, once was a dying alternator.
Posts: 2373 | Registered: Jun 2000
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