 Throttle valve(position) switch, How to test? |
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| EJP914 |
 Jun 22 2010, 08:01 PM
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#1
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Member  Group: Members Posts: 260 Joined: 14-June 03 From: Monroeville, PA Member No.: 821  |
How do you know if this thing is bad or going bad? Just driving down the road at no excessive speed, the engine seems to surge and the car sort of bucks along. No issues at idle or under acceleration.
I thought I read somewhere this switch could be the problem. Is there an article somewhere or referral where I could find out how this switch works and how to test it. Thanks. |
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| underthetire |
Jun 22 2010, 08:03 PM
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#2
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914 Guru Group: Members Posts: 5,062 Joined: 7-October 08 From: Brentwood Member No.: 9,623 Region Association: Northern California |
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| blitZ |
Jun 23 2010, 06:56 AM
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#3
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Beer please... Group: Members Posts: 2,223 Joined: 31-August 05 From: Lawrenceville, GA Member No.: 4,719 Region Association: South East States |
I'm having a similar problem. The car runs great except for the occasional stumble at stead speeds. I replaced my TPS board and adjusted it properly and it still stumbles. Not to say that the TPS is not your particular cause. These things are hard to trace.
I'm wondering if my fuel filter may need replacing and I get an occasional fuel starvation. Although at full throttle there is no stumble. What induction do you have? If it's dJet: Check your FI trigger points and FI grounds, especially the ground under the plenum. |
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| tradisrad |
Jun 23 2010, 07:39 AM
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#4
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Senior Member Group: Members Posts: 985 Joined: 11-September 06 From: San Mateo, CA Member No.: 6,815 Region Association: Northern California |
we just talked about this a week or so ago.
http://www.914world.com/bbs2/index.php?sho...=108094&hl= bucking sure sounds like a tps, second thing would be trigger points |
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| windforfun |
Jun 23 2010, 03:45 PM
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#5
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Senior Member Group: Members Posts: 1,841 Joined: 17-December 07 From: Blackhawk, CA Member No.: 8,476 Region Association: None |
Ditto.
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