ive got a 1994 s10 blazer that when ever it starts up it ideals real high and read on for the rest of the details.. thanks

10

Asked by Apr 02, 2013 at 09:09 PM about the 1994 Chevrolet S-10

Question type: Maintenance & Repair

real high and stays there and goes up in down almost like im pressing the gass in and out  put when its in gear ir will take right off till i stop then it ideals back up high and in the winter time my tires will spin in the ice and it sucks..lol and body got some advice oon wat it might be or wat is causeing it? would be awsome to here from yall...

6 Answers

yes, the EGR valve is sticking...the PCV valve is disconnected the butyl rubber vacuum hoses are all leaking and should be replaced with silicone rubber. The vacuum adavance is sucking air, fuel filter and air filter clogged, thermal control not adjusted properly~

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http://www.amazon.com/Spectre-28906-Silicone-Vacuum- Hose/dp/B00062ZRI2 >>>new vac hoses~

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21,335

wow all that can cause it and another on the intake manifold on top is an air control wired to harness, you might try to remove and clean or replace that part, its energized from a engine temperature sensor t6hat also may be bad

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10

well thanks judge_roy_beans im gunna look in to all those things and ill post wat i figure out after i look at all those things and thanks again...

1 of 1 people found this helpful.
19,245

Your ignition advance is electronic, so there isnt a vacuum advance to suck air. IDK what a thermal control is on a 4.3. Which engine do you have? 4.3 tbi or 4.3 cpi? The problem with these engines is alot of problems cause the same symptoms. Could be IAC, MAP, TPS, Vacuum leak, bad ECM, fuel problem. You can test fuel pressure and vacuum to pinpoint or rule out those systems. The MAP and TPS are easily testable with a volt meter. The IAC is possible to test with an ohm meter. If everything checks out then it could be the computer.

oops. drat. electronic everything....kinda good but '94 seems like one of those crossover years. Perhaps there ARE leaking vacuum connections, and the original diagnosis is still valid~

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