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  Surge in 90 full size van?

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Author Topic:   Surge in 90 full size van?
Hell_Fish
Gearhead

Posts: 685
From: Austin, TX.
Registered: May 2002

posted 12-28-2002 10:55 PM     Click Here to See the Profile for Hell_Fish   Click Here to Email Hell_Fish     Edit/Delete Message   Reply w/Quote
I drove around my in-laws 90 van this week while they were it town and man is it sad shape. I wanted to know what you guys could suggest to look at or fix.

The van surges if going under 55 mph and seems to have a high idle. I think the idle is high to keep it running. I thought the carb may need adjusting at first, but when I drove it at night I noticed the gauge lights dim when I surged. The surges are strong too. If you don't have to brake all the way down it will hop. The engine is a V8. I'm guessing a 302, but didn't get to chance to look. It's a automatic BTW.

Any ideas?
Dustin C

[This message has been edited by Hell_Fish (edited 05-19-2003).]

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SteveLaRiviere
Administrator

Posts: 36138
From: Saco, Maine
Registered: May 99

posted 12-29-2002 07:29 PM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
It's fuel injected. I'd bet the Idle Air Controller is gummed up and in need of cleaning.

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'70 Mustang Mach 1 - '72 Mustang Sprint - '94 F-150

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Hell_Fish
Gearhead

Posts: 685
From: Austin, TX.
Registered: May 2002

posted 12-29-2002 11:23 PM     Click Here to See the Profile for Hell_Fish   Click Here to Email Hell_Fish     Edit/Delete Message   Reply w/Quote
I will have to check, but my brother-in-law swears it's carburated. I did think that sounded odd since my 89 BII is fuel injected.

I will have them check the Idle Air Controller. Thanks.

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SteveLaRiviere
Administrator

Posts: 36138
From: Saco, Maine
Registered: May 99

posted 12-30-2002 08:21 AM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
Unless the vans are real different, I think the last carb on a 302 was in '84.

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'70 Mustang Mach 1 - '72 Mustang Sprint - '94 F-150

Be sure to remember our sponsors, Mustangs Plus, NPD, and Osborn Reproductions.

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mtucker
Journeyman

Posts: 93
From: Wichita, KS
Registered: Oct 2002

posted 01-26-2003 02:04 PM     Click Here to See the Profile for mtucker   Click Here to Email mtucker     Edit/Delete Message   Reply w/Quote
sounds more like an EGR Position Sensor. Other things to consider: Throttle Position Sensor, O2 Sensors, Engine Coolant Tempurature Sensor. Just my $0.02.

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Hell_Fish
Gearhead

Posts: 685
From: Austin, TX.
Registered: May 2002

posted 05-19-2003 04:55 PM     Click Here to See the Profile for Hell_Fish   Click Here to Email Hell_Fish     Edit/Delete Message   Reply w/Quote
Im bumping this up again. The van is a 91. Would bad injectors make it idle surge up?

------------------
Dustin C
"The Mopar Guy!"
56 F-100
Mech. for wifes 69 Mustang coupe
65 Plymouth Barracuda
70 Dodge Swinger

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MLariviere
Moderator

Posts: 3578
From: Biddeford,Me.USA
Registered: May 99

posted 05-20-2003 10:06 PM     Click Here to See the Profile for MLariviere   Click Here to Email MLariviere     Edit/Delete Message   Reply w/Quote
It could be possible. maybe they just need to be cleaned.

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N266fords
Gearhead

Posts: 946
From: Spokane ,WA USA
Registered: Apr 2003

posted 05-25-2003 01:26 PM     Click Here to See the Profile for N266fords   Click Here to Email N266fords     Edit/Delete Message   Reply w/Quote
Maybe if the lights are dimming at the same time your fuel pump might not be getting enough juice to bring the pressure up i would have a load test done on the charging system then go from there..You siad it does it under 55 how about a cloged fuel filter or air filter,or a bad egr valve..Bruce

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