Dead on Rt 495 tonight
10-21-2003, 01:46 PM
#16
Burning Brakes
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Now that it's probably too late, did you notice if the tach dropped to the peg immediately when the engine cut out? Presumably you were coasting with the engine turning immediately after it cut, so if the fuel system is causing the problem, the tach would still be registering. But if the tach falls to the peg while the engine is still turning, it's something in the ignition system.
If the tach drops, check the DME relay (which you already did), then check for 12v on pins (mumble mumble) of the ECU connector, then look at the speed and reference mark senders.
It's probably the ignition system, and my vote is for either the speed or reference mark sender.
Bryan
If the tach drops, check the DME relay (which you already did), then check for 12v on pins (mumble mumble) of the ECU connector, then look at the speed and reference mark senders.
It's probably the ignition system, and my vote is for either the speed or reference mark sender.
Bryan
10-21-2003, 03:09 PM
#17
Pro
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You got it! The sensors are the Winners!
Well the dealer had it diagnosed in 30 minutes. It's the speed/reference sensors. They're going to cost me $190 a piece and 3-4 hours labor.
I guess I can't complain too loudly...I would have spent a lot of time fooling around with it before getting to the sensors...
Sigh.
I guess I can't complain too loudly...I would have spent a lot of time fooling around with it before getting to the sensors...
Sigh.
10-21-2003, 03:23 PM
#19
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Time will tell. He said the tme varies because a lot of them are real hard to get out. Mine hasn't seen snow or salt so mayhaps I'll get lucky on the labor.
10-23-2003, 10:50 AM
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Well here's how it turned out:
The tech had checked the speed and reference sensors and they gave readings of 1200 and 50,000 ohms (spec is 900 ohms). They replaced them both and guess what? Still crapped out. Checked more ignition bits, all checked out. Checked fuel pressure and bingo...the pressure was way too high. Replaced the pressure regulator and the cutting out vanished.
So the fuel pressure regulator was causing the stalling. The new sensors however resolved what remained of my stumbling idle and throttle surge problems.
To their credit they did not charge me labor for the additional time troubleshooting or for installing the regulator.
An expensive lesson.
Steve
The tech had checked the speed and reference sensors and they gave readings of 1200 and 50,000 ohms (spec is 900 ohms). They replaced them both and guess what? Still crapped out. Checked more ignition bits, all checked out. Checked fuel pressure and bingo...the pressure was way too high. Replaced the pressure regulator and the cutting out vanished.
So the fuel pressure regulator was causing the stalling. The new sensors however resolved what remained of my stumbling idle and throttle surge problems.
To their credit they did not charge me labor for the additional time troubleshooting or for installing the regulator.
An expensive lesson.
Steve
