Question about 1994 Chevrolet Astro

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94 chevy astro rough idle and surge when driving

Today while stopped at a stop light, the idle became very rough. After picking my child up from school the van began to surge while driving down the road. Complete tune up a month ago including coil, wires, plugs D-cap, Rotor. and module. This thing feels like its going to die. Once i got home it stated right up but still had a rough idle. waited for an hour and it really didn't want to start at all. the surging idle and surging driving still continious.

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  • 50 Answers

Check throttle body and check for codes

Posted on Feb 06, 2013

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  • Donald Waldrop Feb 15, 2013

    The problem turned out to be a bad regulator. I put in a new one and now have low fuel pressure.

  • freddy Feb 16, 2013

    check Fuel Regulator

  • freddy Feb 16, 2013

    I mean check Fuel Relay

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Posted on Jan 02, 2017

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  • 3 Answers

SOURCE: 1994 chevy astro van awd

underneth the intake manold is were your fuel injector poppet nozzles are, more than likely the fuel line hose that goes thru the back of the intake is split and leaking fuel underneth the intake manifold if you check the fuel pressure you will find that the fuel pressure will drop down to 0 psi as soon as the fuel pump shuts off and it should hold pressure

Posted on Oct 22, 2008

  • 178 Answers

SOURCE: Running "rough"

I had the same issue with my venture. It turned out to be the number 5 plug wire, backside of engine ended up breaking out of the plug carrier and burning in half on the manifold. Your best bet is to trace all the wires to start off with and change the plugs. If that doesn't help, it may be internal. Good luck

Posted on May 15, 2008

  • 11 Answers

SOURCE: 1995 Chevy silverado with a

I have experienced this problem on similar vehicles. You should try and replace the coolant temp sensor. If it is not reading the correct temp to the ecm, it will not get the right fuel map. Also, the cts will not always throw a code.

Posted on Aug 04, 2008

  • 12 Answers

SOURCE: rough idle / engine surges until power is applied

Sounds like a possible vaccume hose leak?

Posted on Feb 07, 2009

  • 6 Answers

SOURCE: 2000 Chevy Astro Van while driving just stops running

Hey I had my rotor and all that stuff replaced on my 2000 astro van, Intermittently it would not run, The problem was I hit a puddle one day and water flew up on top of the roter like 3 drops, it created a trace( it was arching) Thats why it was intermittent.Take a look at the cap look for like a discoloration on it clean it and put it back on.Sounds too easy but remember I had all new parts too.

Posted on Apr 23, 2009

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ROugh idle


there are 2 things that usually cause this, one is a dirty intake idle control valve and the other is hard engine mounts, I would say that both most likely apply to your car. try cleaning the intake with the following procedure from Ford.
Here is the most common cause of surges and stalls and low idle rough idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Feb 18, 2009 | 1994 Ford Probe

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Rough idle / engine surges until power is applied


Sounds like a possible vaccume hose leak?

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