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1998 astro van runs fine at times and terrible sometimes. getting worse by the day. started as if pulling off and not getting fuel or taking turns fast. getting worse even shouting off while driving. now when that happens shakes and knocks, maybe underneath seat. and few times exhaust smell strong gas and blue smoke. takes long time to go up hill or starting off. backfired once when smoke and gas with hard rattling shaking and crazy

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Park it and forget where you left it. Or if you have any mechanical skills or inclinations, you could do some basic tests, but avoid the dangerous driving test - do this with the engine running if it needs to be running, but stationary.
It sounds like it could be the catalytic converter is getting clogged. It blocks the exhaust from going out the tail pipe. When the car is completely cool, if you thump it pretty hard, or grasp and shake it, and hear any rattling, then it is damaged and probably blocking your exhaust. If it sounds good, you could next open the exhaust somewhere ahead of the cat converter, like pulling out an oxygen sensor temporarily, or disconnecting the exhaust somewhere. Then run the engine and see if it noticeably improves. That's a bad cat.

Last, which probably should have been first, is check for trouble codes. Most important don't let repairs bankrupt you.

Posted on Feb 16, 2014

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Posted on Jan 02, 2017

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SOURCE: long crank time before starts

Thoroughly clean interior of throttle body especially area where butterfly flap seats and all drillings, use aerosol carb cleaner, check air filter and spark plugs (platinum type only!). Then set idle with a consult unit or similar, engine management must be in service mode to set idle properly.
Also test coolant temp sensor it may be open circuit. If you don't know how to do this ask me.
Forget about earth if starter turns engine over at normal speed.

Posted on Dec 13, 2008

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SOURCE: 2002 LS shaking, engine light on smell fuels

Brother I have the same car. Go trade it in ASAP! The reason your car is doing this, is because there is oil leaking in the spark plug holes from the valve gasket covers. You will not see any oil on the ground and if you ask a regular tech they will say they do not see a problem either. After spending thousands and reading other forums I narrowed down the problem. When the oil works its way down into the sparkplug holes it causes your car to misfire, idle rough, and sometimes die out. There is no way for the oil to escape so it ends up fouling out the plug and ruining the ignition coil which are $85 a piece and there is 8 of them on the V8 engine and 6 on the V6. Also known problems are noisy clunking in the front end. Ball joints go bad and can only be replaced by purchasing the whole control arm. Take the car to a Lincoln dealer and let them tell you what I just told you. Then get the hell out of there because they will screw you with no vaseline. Take it to someone you trust. Happy New Year! 2009

Posted on Jan 03, 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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