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stranded please help
i'm stranded in roswell NM. my 86 951 will run perfectly cold; once warm, it will start and idle no problem, and rev if you pull the throttle by hand, BUT if you push the gas peddle under load it will hesitate then fire-- at first; after driving several minutes, it will simply drop down to idle and stay there; it will roll along top speed 20mph until cool again.
fuel pressure: 28 to 35 psi air flow meter is working throttle position sensor is working amps at the battery ~13 new alternator just replaced column switches just fried 3.5 year old battery w/ plenty of electrlyte cd player is malfunctioning horn relay is very hot turbo water pump is new and the relay works but it is not coming on any ideas? thanks for reading |
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06-01-2007, 04:43 PM
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winter-hater club member
Join Date: Oct 2003
Location: salt lake city, utah
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fuel delivery problem, causing knock, perhaps?
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2000 Corvette - ????, 2007 Buell XB9R - Astrid, 1996 Discovery - Piglet, 2000 Forester "COOL PRIUS!" - Nobody Ever |
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06-01-2007, 04:55 PM
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no knock, and pressure is just below specs (33-39psi)
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Trust no one who does not drive a Porsche daily. just kidding. Sort of |
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06-01-2007, 04:57 PM
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vacuum leak.
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2000 Corvette - ????, 2007 Buell XB9R - Astrid, 1996 Discovery - Piglet, 2000 Forester "COOL PRIUS!" - Nobody Ever |
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06-01-2007, 05:21 PM
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no broken hoses, visible clamps all tightened; are there other vacuum leak possibilites? what does the heater valve control?
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Trust no one who does not drive a Porsche daily. just kidding. Sort of |
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06-01-2007, 05:34 PM
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on a 951, all kinds of hoses under the intake manifold. check the rubber intake boots, double check the rubber intercooler hoses, check the BOV and the rubber parts that connect it to the intake.
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2000 Corvette - ????, 2007 Buell XB9R - Astrid, 1996 Discovery - Piglet, 2000 Forester "COOL PRIUS!" - Nobody Ever |
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06-02-2007, 05:40 AM
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Re: stranded please help
Quote:
You need to make sure that the TPS is working when the engine is hot. Ditto on the airflow meter. Also is there any smoke or unusual emmision from the exhaust ? Sox
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"Little problems always come back and bring bigger friends with them". 1986 951"MADDOG" black Dual port WG, 4 port control valve with EBC |
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06-02-2007, 03:27 PM
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TPS is brand spankin new; no emissions; can anyone tell me exactly how to test the AFM? i have a new very expensive one in my hands but i would pre fer not to waste my money when the mechanic here thinks the AFM is working and i already blew 200 replacing the TPS
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Trust no one who does not drive a Porsche daily. just kidding. Sort of |
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06-03-2007, 10:14 AM
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plug the new AFM in and see what happens. no harm done.
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2000 Corvette - ????, 2007 Buell XB9R - Astrid, 1996 Discovery - Piglet, 2000 Forester "COOL PRIUS!" - Nobody Ever |
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06-03-2007, 10:50 AM
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My guess was going to be the TPS, have you tried reading the blink code?
Lou
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'87 944 na, sold to a friend '89 951, Weltmeister chips, 3mm WG shim, 968 CS sway bars, stock looking engine bay, just turned over 125K miles. I run Redline oil. |
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06-03-2007, 05:29 PM
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you're not gonna like this, but you could have an issue with the DME. A cold solder joint or failing Injector driver could cause this.
Also, try disconnecting the O2 sensor and see what happens.
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1988 951 Alpine White / Burgandy Profec B spec II EBC,HomeBrew Chips, WideFire HG, Tial 38mm, Magnecor Wires, Koni Rears, Adj Rear Droplinks, Zeitronix WideBand. |
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06-04-2007, 11:00 AM
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yeah, i was going there next. is there someone you can borrow a DME from?
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2000 Corvette - ????, 2007 Buell XB9R - Astrid, 1996 Discovery - Piglet, 2000 Forester "COOL PRIUS!" - Nobody Ever |
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06-04-2007, 01:01 PM
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