What could be causing trouble with 89 Toyota p/u?

FOWENS

MEMBER
1989 TOYOTA PICKUP
180,000 MILES

Seems to be missing really bad especially after motor warms up good. Losing power and chugging/sputtering. We have replaced fuel pump, fuel filter, spark plugs and ignition module. Also cleaned out gas tank. Finally took it to a repair shop and they are at a loss to what the problem is. They said it wasn't showing any codes.

5 Replies

HMAC300

MECHANIC
48,601 POSTS

Check vacuum if it's 15" or below check for a plugged exaust.
Is this carb or fuel injection?

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Saturday, January 7th, 2012 AT 12:40 AM

FOWENS

MEMBER
3 POSTS

It's fuel injected. The mechanic said he was at a loss but that it could be the distributor or computer module.

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Saturday, January 7th, 2012 AT 1:03 AM

HMAC300

MECHANIC
48,601 POSTS

There is an EFI main relay, in the pic attached. See if relay A is same as B and try switching them to see if that helps. Otherwise i'd try the igniter first as it will be cheaper. The igniter is by the distributor.

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Saturday, January 7th, 2012 AT 1:10 AM

HMAC300

MECHANIC
48,601 POSTS

I forgot to send the pic lol.

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Saturday, January 7th, 2012 AT 1:11 AM

FOWENS

MEMBER
3 POSTS

Thanks for your help. Will give it a try this weekend and see what happens. This has been going on now for 2 months and just when we think it's fixed it starts to act up again. The problem seemed to have just started out of no where and we have replaced everything we could think of that may be the problem. This is actually a truck that we bought for our son to drive to work but he's afraid to try to drive it at all now.