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Re: 89 S-10 Blazer 4.3 Rough Acceleration
IMHO = In My Humble Opinion
Here's a few things you can check.
EGR, remove and clean. Your EGR should be vacuum actuated and the diaphragm may be ruptured. To check, unplug the vacuum line and plug the vacuum hose with something that will fit, a sharpened pencil will work. Start the car up and see if there is a difference.
Air Filter, replace
Fuel filter, replace
Fuel pressure, check - If you don't have the guage, ask around with some of your friends.
The MIL is the "check engine light" it stands for "Malfunction Indicator Lamp". If this lights up, the computer has detected a fault and has stored a code. You will need a code reader to retrieve it. If you are close to an AutoZone, they perform this for free. And they may be able to check your fuel pressure as well.
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