[RedMercury]

Hey, PlanetIsuzoo:

I've been a long-tome forum watcher/reader and new member.
This is my first HELP! post.

I'm working on restoring a 1994 Rodeo, 3.2l v6, 4x4, auto transmission.
She is doing well and usually starts on the first crank. Idles, when warmed-up, at about 750 rpm
After spending lots of time (and money!), it has one annoying issue left...

When the Rodeo is hot, especially in warm weather, and I take it to run a few errands (5-10 minute drives, engine off, engine start) - When I start the engine it will surge to about 1500 rpms, then drop almost immediately to very low rpms (sometimes the engine will actually die), and then stabilize at 750 rpms and run fine.
If it does die, when I crank it again, it will start (longer cranking) and then run fine.
For this issue, I've cleaned the throttle body, checked the TPS, new intake manifold gaskets.
Any ideas????
Thanks!

 

[turnerd]

Check your fuel pressure when it dies and has trouble starting. Sounds like the motor might not be getting enough gas.

 

[RedMercury]

turnerd - Thx! I forgot to mention that I also replaced the fuel line and put in a new fuel-filter.

 

[turnerd]

Another thing to try is lubricating (or replacing) the idle air control valve (IAC). Typically, it causes symptoms such as too high of an idle when it gets stuck closed, but maybe it is malfunctioning. This is known to be a problem on these motors, that's why I suggest it.

 

[RedMercury]

Got it. Thank you! I was wondering about the fuel injectors??

 

[turnerd]

I've had a couple cars with leaky fuel injectors and they would be really hard to start when warm. After sitting for 10 minutes, they would crank and fire up then immediately die. On both cars I could hold the gas pedal to the floor while cranking to activate ECM flood clear. Then the cars would always start, rev really high and then settle to a normal idle (sometimes a little rough). Soooo leaky injectors could very well be your issue

 

[RedMercury]

turned- those symptoms seem to be similar to what I’m experiencing. The IAC checks out, and I dealt with the sticky throttle cable. Seems like I need to commit and just replace the injectors. Thanks for the input!

 

[turnerd]

turned- those symptoms seem to be similar to what I’m experiencing. The IAC checks out, and I dealt with the sticky throttle cable. Seems like I need to commit and just replace the injectors. Thanks for the input!

Make sure you replace the o-rings on both sides on the injectors if you go this route

 

[RedMercury]

Great advice! Thanks for all of your help with this