Reduced Engine Power after Porting TB HELP!!
Thread Starter
Drifting
Joined: Aug 2002
Posts: 1,538
Likes: 290
From: Central MO
Reduced Engine Power after Porting TB HELP!!
Had my TB ported and polished and replaced it this evening. On trying to start got a message of reduced engine power. All connections are firm, have reset any codes. Please help and advise! TIA! :confused:
Team Owner
Joined: May 2002
Posts: 24,459
Likes: 13
From: Phoenix
St. Jude Donor '03-'04-'05-'09
Re: Reduced Engine Power after Porting TB HELP!! (AZGASSER)
Possibly the throttle sensor positioning switch (on the passenger side) the little plastic thing that plugs in to your TB....may be a possible culprit. Undo it, make sure it's clean and positioned properly.
Otherwise you may have to get a code scan on whats going on???
Otherwise you may have to get a code scan on whats going on???
Le Mans Master
Joined: Oct 2003
Posts: 8,863
Likes: 86
From: PA
St. Jude Donor '08
Re: Reduced Engine Power after Porting TB HELP!! (AZGASSER)
thats the little computer that sits in front of the big one. little one ecu and the big one is pcm. the ecu controlls throttle and other devices that are infront of the intake manifold. the ecu is what would show reduded engine power and traction bla bla. are you sure all is hooked in all the way?
Le Mans Master
Joined: Oct 2003
Posts: 8,863
Likes: 86
From: PA
St. Jude Donor '08
Re: Reduced Engine Power after Porting TB HELP!! (AZGASSER)
when an ecu goes bad those are the messages that show on dic . i forget the code #. but there is no reason for it to go bad, gotta be a conector!!! :cuss :cuss
Thread Starter
Drifting
Joined: Aug 2002
Posts: 1,538
Likes: 290
From: Central MO
Re: Reduced Engine Power after Porting TB HELP!! (NICK YOSKIN)
Ran the codes 1120,1220, 15??, all related to the TP motor or sensors. So I took everything apart, used some compressed air to blow out all the fitting and put it back together. Turn the key and :cool: it fired right up. Just got back from a quick spin and I love it. Thanks for all the help!
Advanced
Joined: Feb 2004
Posts: 62
Likes: 0
From: Kinston AL
Re: Reduced Engine Power after Porting TB HELP!! (AZGASSER)
The exact same thing happened to me. Mine was idling about 1800 rpm and when i tried to hit the gas it fall on it's face(flooding). I had the same reas out, "reduce engine power" and "service traction system". First thought was oh god i messed it up b/c i had never don it before. Upon popping the hood, i had forgot the plug in that plugs into the side of the throttle body. My best advice is calm down and double check everything.
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Team Owner
Joined: Feb 2003
Posts: 37,329
Likes: 12
From: Plano Texas
CI 6-7-8-9 Veteran
CI-VI Car Show Winner
St. Jude Donor '07-'08-'09-'10-'11-'12-'13
Re: Reduced Engine Power after Porting TB HELP!! (AZGASSER)
Ran the codes 1120,1220, 15??, all related to the TP motor or sensors. So I took everything apart, used some compressed air to blow out all the fitting and put it back together. Turn the key and :cool: it fired right up. Just got back from a quick spin and I love it. Thanks for all the help!
Racer
Joined: May 2000
Posts: 321
Likes: 0
From: Valencia, Los Angeles CA
Re: Reduced Engine Power after Porting TB HELP!! (AZGASSER)
Most likely a P1514 Code
This can happen with ported TB's if you remove too much material around the throttle opening area. If you look at a stock TB there is a slight decrease in diameter. This is critical throttle tip in area.
What's happening is that the PCM detects greater airflow through the MAF then what the PCM determines is appropriate for a give throttle position.
You can either:
Put stock TB back on,
Have another ported TB done making sure they don't remove the lip completely at the first 5-10deg of throttle opening,
or have your computer programmed to adjust the P1514 criteria to compensate for the ported TB.
This can happen with ported TB's if you remove too much material around the throttle opening area. If you look at a stock TB there is a slight decrease in diameter. This is critical throttle tip in area.
What's happening is that the PCM detects greater airflow through the MAF then what the PCM determines is appropriate for a give throttle position.
You can either:
Put stock TB back on,
Have another ported TB done making sure they don't remove the lip completely at the first 5-10deg of throttle opening,
or have your computer programmed to adjust the P1514 criteria to compensate for the ported TB.
Tech Contributor
Joined: Mar 2003
Posts: 12,094
Likes: 197
From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
Re: Reduced Engine Power after Porting TB HELP!! (Mike Morgan)
Most likely a P1514 Code
You can either:
Put stock TB back on,
Have another ported TB done making sure they don't remove the lip completely at the first 5-10deg of throttle opening,
or have your computer programmed to adjust the P1514 criteria to compensate for the ported TB.
You can either:
Put stock TB back on,
Have another ported TB done making sure they don't remove the lip completely at the first 5-10deg of throttle opening,
or have your computer programmed to adjust the P1514 criteria to compensate for the ported TB.
