1989 Chevy Blazer stumped

SEH3271

MEMBER
1989 CHEVROLET BLAZER

Engine Mechanical problem
1989 Chevy Blazer 6 cyl Four Wheel Drive Automatic

I have a 1989 chevy s10 blazer 4.3 ltr 4 wd
when I bought it I was told it had a bad fuel pump so I replaced it, along with the fuel filter then a few vaccum lines ( 10 ft worth) also changed the egr valve.
What it does is this, I start it, it will idle fine then slowly bog out and die, If I keep my foot on the gas it runs ok, but I put it in drive it stalls. If I want it to move I have to apply the brake and step on it it studders a little then runs fine on the road unless im coasting or at a light, then it stalls.
Can anyone tell me what else I might be able to do or do I need to a mechanic or shoot it lol thnx.

3 Replies

JOSEPI387

MEMBER
10 POSTS

Sounds as though you may have a serious vacuum loss. You should be able to hear the vacuum sucking under the hood when the engine is running. Could be related to the brake booster vacuum also.

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Thursday, May 15th, 2008 AT 6:52 PM

RHALL77

MECHANIC
3,361 POSTS

Also is your check engine light on?

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Friday, May 16th, 2008 AT 8:52 AM

SEH3271

MEMBER
2 POSTS

The check engine light isnt on, i'll check the brake booster line also.
So far I have changed fuel pump, fuel filter, egr valve spark plugs distributor n rotor im currently rebuilding injectors but lost a o ring so cant finish that til I get that back on. I took it apart to clean it and figured might as well replace all the rings. Most of the vaccuum lines were replaced. The ones I didnt I listened for leaks and checked the vacc pressure, didnt notice anything out of the ordinary. Working on getting a new or used vapor canister but no one sells new ones hope too find one at a junk yard so I dont have to goto a dealer. Only other things i've read about were the iac vailve or throttle body gasket. I hear its common for the gaskets to be sucks in and create a leak.
Thanks for the feedback and i'll post what happens.

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Friday, May 16th, 2008 AT 10:13 AM