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Engine has trouble until it gets warmed up

Leros

Leros

Lifer
I have a 2000 Isuzu Rodeo. This started happening a few days ago.

When I first start the car, the engine is really shaky and the car vibrates around a bit. If I don't start driving the engine will die in about 15 seconds. If I drive for 30 seconds then stop, the engine will die in 15 seconds or so.

After a few minutes of driving, the engine stops being shaky and starts acting normal. If I come back to my car while the engine is still warm, everything acts fine. It only has problems when the engine has cooled down all the way.

What does this mean?
 
Originally posted by: Vetterin
Did you just get some gas? First thought would be bad gas. Second would be dirty IAC valve and TB.
Click to expand...

I did get gas recently, but I don't remember if it started right after getting the gas. I have no idea what and IAC valve or TB are.
 
Originally posted by: Leros
Originally posted by: Vetterin
Did you just get some gas? First thought would be bad gas. Second would be dirty IAC valve and TB.
Click to expand...

I did get gas recently, but I don't remember if it started right after getting the gas. I have no idea what and IAC valve or TB are.
Click to expand...

Idle Air Control and throttle body. It shouldn't be too expensive to get a tune-up (I'd guess $100 or less with plugs and wires), but I can't recall the typical charge for cleaning those items.
 
Originally posted by: nakedfrog
Originally posted by: Leros
Originally posted by: Vetterin
Did you just get some gas? First thought would be bad gas. Second would be dirty IAC valve and TB.
Click to expand...

I did get gas recently, but I don't remember if it started right after getting the gas. I have no idea what and IAC valve or TB are.
Click to expand...

Idle Air Control and throttle body. It shouldn't be too expensive to get a tune-up (I'd guess $100 or less with plugs and wires), but I can't recall the typical charge for cleaning those items.
Click to expand...

So a tune-up should catch this problem? I mean, after I drive to the place, the problem won't occur anymore since the car will have warmed up.
 
It's possible that it will. It could also be the fuel filter, which I would expect to be changed in the tune-up. You could also ask them to check out the IAC and TB while they're in there, but depending on the shop, they could tell you it needs cleaning just to get more cash out of you.
 
Originally posted by: nakedfrog
It's possible that it will. It could also be the fuel filter, which I would expect to be changed in the tune-up. You could also ask them to check out the IAC and TB while they're in there, but depending on the shop, they could tell you it needs cleaning just to get more cash out of you.
Click to expand...

I need a tune-up and an alignment anyway. I guess I can tell them what is going on and try to sound half knowledgable.
 
Might want to check the condition of the air filter as well, clogged filters can cause
a MAF sensor to do weird things...
 
Funny, my family has an Izuzu with the same problem. The only difference is, it's badged as Chevy LUV pickup, it was made in the 70's, and the odometer has turned over at least twice. I guess they haven't made too much progress... 😉 Can't argue with any vehicle that tops 200K, though. The A/C still blows really cold, too.
 
Originally posted by: BUTCH1
Might want to check the condition of the air filter as well, clogged filters can cause
a MAF sensor to do weird things...
Click to expand...

Hmm... I just got an oil change and the air filter looked clean to me. I had it changed 6 months ago.
 
I don't know if this makes a difference. About a month ago, I got my oil changed. Rather than using 10w30 like I had before, they used 5w30. I didn't notice until they gave me the bill. They said (I honestly have no idea) that it would be fine.
 
You can start with a can of dry-gas. I once filled up at a run down dumpy station and got gas with water in it, caused the symptoms your describing, the dry-gas cured it. If not that
then pull one of your plugs and have a look at it. If it's looking bad get them changed
along with new wires. The engines computer should feed a richer mixture until the car
warms up so Woodie1's suggestion that a bad coolant sensor may also be the culprit. Good luck and let us know how it goes..
 
do you have a check engine light?

if yes goto auto zone and get a reading

cause it really could be anything.. I have a cust. having almost the same problem and the code was coil pack malf.

I cant see it being a iac or tb if it's a iac it will throw a cel and go into safe predetermined values (via ecu)

and that will not cause it to stall.
 
Originally posted by: BUTCH1
You can start with a can of dry-gas. I once filled up at a run down dumpy station and got gas with water in it, caused the symptoms your describing, the dry-gas cured it. If not that
then pull one of your plugs and have a look at it. If it's looking bad get them changed
along with new wires. The engines computer should feed a richer mixture until the car
warms up so Woodie1's suggestion that a bad coolant sensor may also be the culprit. Good luck and let us know how it goes..
Click to expand...

QFT
 
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