Question about 1990 Pontiac Grand Prix

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If engine is get off when is hot then it doesnt restart

When it get cold start without trouble

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  • aquilesperez Feb 01, 2009

    Vehicle is Pontiac Grand Prix LE year 1990.

    Engine 3100 cc (3.1L) V6 Multiport FI

  • honeymokey
    honeymokey May 11, 2010

    Get off when hot does not make any sense. more info

  • mike loshbough
    mike loshbough May 11, 2010

    does it run rough when warm?

  • mike loshbough
    mike loshbough May 11, 2010

    what vehicle again and what engine is in it?



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Crank sensor

Posted on May 03, 2010


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Check engine light came on after driving a ways on the highway- engine hot, warm outside, temp gauge read cold, then dropped even lower to all the way cold; when I finally got home and turned the car off...

Without the actual trouble code no one can help you. Trouble codes are the starting point. Guessing without the trouble code is a fool's game.

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Restating 2000 odyssey after warmed up

not sure what that means.
lets start over.
your saying car runs great, cold then hot.
then hard to restart a hot engine, right?
the light thing i dont understand
first off, when you stall and engine or just key ON.
the lamps all self test (read the operators guide there)
this is only a lamp test.
odd, the most important is skipped the CEL, check engine light.
is the engine stalling?
hot restarts, fails are: many.
  1. injector leaking at shut down.
  2. ECT reads to cold when hot. can be below caused
  3. Engine thermostat stuck open and restarts are over rich and floods. that hot engine must be at 180F or more,
  4. never did a 60,000 mile tuneup this decade?
  5. Fuel pressure too high.
i do tune ups first.
then check coolant temperatures, hot. 180F min, and holding or i kick the thermostat to the curb (new stat time)
if it sill dont want to hot start
out comes the scan tool
i scan it, got DTC errors.
is ECT reading 180F ? or above?

that is start on diagnosis.

Feb 25, 2014 | 2000 Honda Odyssey

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Engine cold can not start

runs hot,ok, restarts hot ok
just dont start , cold, but it must because how do you get to 2hours?
from hot?
my guess, is it sometimes does start cold.
ever tune it up at the critical 60k mile service, ever, this decade?
that covers 99% bad cold starts. so , we do that first.
diagnosis is like 10x a tune up, so........ $$$$$

Feb 02, 2014 | 1994 Toyota Corolla

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Hardstart hot cold ok

don't want to start after it sets about 30 min.,if it does start it will run rough and then die.let it set and get cold it will start.What is the the trouble?

Jan 15, 2013 | 2001 Buick Regal

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I just replaced the cyl. Head gaskets in my 97 toyota 4 runner 4cyl. And i having problems to start the engine when is cold, when is hot start like new

Jun 07, 2012 | 2007 Toyota Hilux 2.7

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Car idols and is perfectly fine. however when you drive after a few minutes it heats up. what could this be? i put coolant in it and the fans come on as they should but still gets hot.

Bad thermostat? check to see if your upper radiator hose is getting hot and that coolant is flowing into the radiator.

If you want to see if the stat opens you need to start with a cold engine. You can remove the radiator cap when the engine is cold without risk of getting burned by escaping steam. Then you start the engine and wait for the coolant to start flowing when the stat opens. If the car heats up and the stat doesnt open then you should replace it.

You said the fan comes on...which usually means the radiator is getting hot enough.....perhaps your radiator is getting plugged internally or you have a poorly functioning water pump?

Check these things out and let me know how things are.

Good luck and be careful.

Mar 07, 2010 | 1998 Jaguar XK8

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Trouble getting car started.

have the fuel pressure tested, suspect the fuel pump is on the way out.

Mar 02, 2009 | 1998 Pontiac Grand Prix

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1996 dodge avenger when cold, the transmission go in limp mode

Is the vehicle's Check Engine Light on? It should briefly light up when you turn the key on (before you start the engine) to show that the light is working correctly. Based on what I've read I believe you should have one or more trouble codes. A place like AutoZone will read the trouble codes for you for free, and you can look them up here -

Dec 12, 2008 | 1998 Dodge Avenger

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The car doesnt run

you have a sensor some were not likeing the heat. they can go this way sometimes. you need to run diagnostics as the engine is warming up and have it set to view the engine as it warms up to find the problem. it could be a cam sensor as they prone to do this when they are hot then work fine when they are cool.

Jun 18, 2017 | 1993 Dodge Shadow

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