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1987 Volkswagen Vanagon 2.1 L

Trans:         Standard
Mileage:       150,000 mi
VIN:           WV2YB0257HH073807
Fuel:          EFI
Ignition:      Hall Unit
Emissions:     Ca Emissions

Symptoms:      dies
Occurs:        After 30 miles

_________________________ UPDATE: __________________________

Thanks for all the help so far.

Many techs suggested the ECU. Since there is no way to test
it, and everything else tested good, I replaced it. No
difference. I am still getting 30 miles and then problems.

Others suggested the AFM and the updated harness. My
understanding is the harness is supposed to help with
bucking or surging. That is not the problem so I am leary
to spend $150 on an unnecessary part. I took apart the AFM.
There was no corrosion. I cleaned it and resealed it. No
help there.

I cleaned the grounds. I replaced the coil. Still no help.

Any more suggestions????

____________________ ORIGINAL MESSAGE: _____________________

This vehicle was towed in on Friday. These people are from
out of town and are stranded here.

The vehicle lost power and then died. It was towed into my
shop. It fired up and ran great. The vacuum line to the
fuel pressure regulator was broken. I replaced the line and
checked the plugs. The were black velvetty and old so I
replaced them. I checked the air flow meter and the fuel
pump. The pump has 36 lbs without the regulator and my
gauge vibrates between 31 and 34 lbs with the regulator
hooked up. It smooths out at high rpms. The vacuum gauge
bounces between 8 and 12 at idle but smooths out at high
rpms.

After 30 miles the vehicles starts to lose power and tries
to die. I feathered the throttle and it starts running good
for about 2 miles and then does it again. Feathering the
throttle makes it run good every time. I can let the
vehicle run in my shop for over an hour and it still runs
good. It is only after about 30 miles of freeway driving
the problem returns. The new plugs are black and velvetty
again.

I took off the cat and it appears to be fine. When the
vehicle dies, I checked the fuel pressure and it was still
32lbs. I changed the fuel pump, it is still dieing. These
people are frustrated and want there car done now.

darryl

Darryl Evey
desertauto@aol.com
Owner/Technician
Desert AutoHaus
Victorville, California, USA

iATN Technician Sponsor
http://members.iatn.net/pages/darryl_evey.html

___________________ TEST AND REPAIR DATA ___________________

MANIFOLD VACUUM READINGS

Idle:   11 in.

Checked for codes and none were found.

TESTING AND RESULTS

Fuel Pressure - 31-36 lbs

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