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  #1  
Old 07-30-2011, 10:16 AM
dyna mite dyna mite is offline
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Default Engine hesitates, stalls when hot

After driving for 1-2 hrs on a hot day(July in Arizona) engine will hesitate, stumble when trying to accelerate after lightly lifting the gas pedal then pushing it back down. Engine will then stall at stops- will easily restart but but must rev it to 2000-3000 rpm to keep it from stalling. No check engine light, no trouble codes.
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1998 Ranger 4x2, 2.5L 4 cyl, 5-spd, bone stock.
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Old 07-30-2011, 01:21 PM
killj0y killj0y is offline
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Default Re: Engine hesitates, stalls when hot

Clean out your IAC valve see if that helps. Is it throwing any codes?
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Old 07-30-2011, 02:29 PM
dyna mite dyna mite is offline
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Default Re: Engine hesitates, stalls when hot

no codes. i'll try the iac then go for test drive. thanx.
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Old 07-30-2011, 06:19 PM
dyna mite dyna mite is offline
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Default Re: Engine hesitates, stalls when hot

thanx killj0y. i cleaned iac- it was cruddy. drove for 1 hr same road where i didnt think i would make it home the other day. much better performance. still had 2 slight stumbles and 2 stalls near end of drive(outside temp 110*F). put truck in neutral and revved engine from idle. it stalled a coupla of times when i mashed pedal. if depressed slowly its ok. I can live with it for now. no check engine light.
p.s. cleaning iac did take care of fluctuating idle with a/c on that i had. thanx again.
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Old 08-01-2011, 11:17 AM
mt1986 mt1986 is offline
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Default Re: Engine hesitates, stalls when hot

I just recently had a similar problem with my 86 2.3 ranger, I found the problem to be corrosion in the wiring connectors at the fuel injectors, the truck would run fine until warmed up, then would act like it was running out of gas, stalling, refusal to restart until allowed to cool. It just wasn't getting signal to squirt fuel, upon inspecting all the connections found bad corrosion in 3 of the 4 injector connections, cleaned and dielectric greased, has not missed a beat since. After performing clean up job found out that it is a common problem with the 5.0 mustang crowd and can cause all sorts of strange driveabilty issues. The 5.0 people call the connections "salt and pepper shakers". It isn't a difficult job but I did remove the top of the intake to gain better access to the injector connections. Good luck
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Old 06-26-2013, 10:26 AM
Brucehoffman Brucehoffman is offline
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Default Re: Engine hesitates, stalls when hot

I have a 1990 2.3 5 speed that loses power when outside temp is hot. After I pull over it will start after 1 minute. Does not happen when outside temp is cool or after sundown. I live in mesa az. The engine temp is in the lower operating range. Any suggestions??
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