Vararam install and Code 1515 - cause or coincidence?
Thread Starter
Safety Car
Joined: May 2007
Posts: 4,812
Likes: 46
From: Taylorsville North Carolina
Vararam install and Code 1515 - cause or coincidence?
Installed new Vararam and went to Rd ATL and in 4th gear at 130 mph car kicks into "Reduced Engine Power".
. Called a friend with internet, who looked up code 1515 (Command vs Actual Throttle Position Performance) solutions. Retighten all connections between MAF and TB. Took it on highway to rev limiter in 1st and 2nd - no codes. Go back on track 4th gear, 5550 rpms - R.E.P. So I'm thinking there is not enough flex and it is pulling connection apart. So I loosen connection where power duct goes into filer connection, so if any flex, it would flex there. Still - R.E.P.. Checked connections this morning and looked into TB to see if something was stuck in there but it was not. Any one have a clue where to look next?
. Called a friend with internet, who looked up code 1515 (Command vs Actual Throttle Position Performance) solutions. Retighten all connections between MAF and TB. Took it on highway to rev limiter in 1st and 2nd - no codes. Go back on track 4th gear, 5550 rpms - R.E.P. So I'm thinking there is not enough flex and it is pulling connection apart. So I loosen connection where power duct goes into filer connection, so if any flex, it would flex there. Still - R.E.P.. Checked connections this morning and looked into TB to see if something was stuck in there but it was not. Any one have a clue where to look next?
Race Director
Joined: Jun 2004
Posts: 19,459
Likes: 48
From: Schaumburg IL
CI 7-8-9-11 Veteran
St. Jude Donor '06-'10, '13
Yea, sounds like something is wrong with the throttle body itself, or the module where you plug it in... does the connector itself,where it plugs into the side of the throttle body look clean? Did you check that particular connection?
Could just be a coincidence since you dont really change anything on the TB when installing a Vram. could you have knocked something loose on the throttle body when you were installing the air bridge?
Hope you get it solved, good luck
Could just be a coincidence since you dont really change anything on the TB when installing a Vram. could you have knocked something loose on the throttle body when you were installing the air bridge?
Hope you get it solved, good luck
Thread Starter
Safety Car
Joined: May 2007
Posts: 4,812
Likes: 46
From: Taylorsville North Carolina
I took the connector itself off and it looks fine, no frayed wires, connerctors look good. Looked inside tb itself, and saw nothing. Drove 160 mi yesterday and it runs fine. Only in 4th at above 5500rpms does it seem to happen.
AARRGGHHH!!!!!
AARRGGHHH!!!!!
Race Director
Joined: Sep 2006
Posts: 11,214
Likes: 1,140
From: Santa Rosa Beach FL
Race Director
Joined: Jul 2004
Posts: 16,795
Likes: 62
From: Lake Havasu City, AZ
Did you by chance use the plastic velocity stack that slips inside the throttle body...
I did and got reduced power.... the plastic stack was occassionally moving and interfering with the movement of the butterfly valve on the throttle body causing the throttle position sensor to send a code.
I removed the plastic velocity stack and the problem went away permanently.
I did and got reduced power.... the plastic stack was occassionally moving and interfering with the movement of the butterfly valve on the throttle body causing the throttle position sensor to send a code.
I removed the plastic velocity stack and the problem went away permanently.
Thread Starter
Safety Car
Joined: May 2007
Posts: 4,812
Likes: 46
From: Taylorsville North Carolina
Did you by chance use the plastic velocity stack that slips inside the throttle body...
I did and got reduced power.... the plastic stack was occassionally moving and interfering with the movement of the butterfly valve on the throttle body causing the throttle position sensor to send a code.
I removed the plastic velocity stack and the problem went away permanently.
I did and got reduced power.... the plastic stack was occassionally moving and interfering with the movement of the butterfly valve on the throttle body causing the throttle position sensor to send a code.
I removed the plastic velocity stack and the problem went away permanently.
Thread Starter
Safety Car
Joined: May 2007
Posts: 4,812
Likes: 46
From: Taylorsville North Carolina
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