Hot starting problems................. - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

docomo · 11-09-2003, 01:46

My car seems to be a bit struggling to start in hot afternoon after some short runs (i.e. around 5 minutes). It start at the first moment, with rev bouncing between 1000rpm to close to 0 rpm, misfires for 10 sec. and then stalls with the battery light on for a few times during the process. And she will idle well immediately if I just press the accelerator momentarily after starting up.

Got no trouble to start her up in morning but it's behaving bit strange under the hot sunshine, what may cause the problem? It's a 88' NA Fairlane

juarez · 11-09-2003, 01:50

So, is the car fully cooled down, and just sitting in the sun? Or is it still a bit warm from running? And what mods have you done to it?

On LPG, mine hates starting if it has been running for a few minutes and is still pretty cold, for instance...

Also, MPFI or CFI?

docomo · 11-09-2003, 01:53

The car engine is pretty much warm, I suppose. And it's a MPFI 3.9L

juarez · 11-09-2003, 02:03

Does it get sluggish when it gets hot? There have been threads where people say their car gets sluggish when hot, and is hard to start..

docomo · 11-09-2003, 02:26

Quote:

Originally Posted by juarez

Does it get sluggish when it gets hot? There have been threads where people say their car gets sluggish when hot, and is hard to start..

Ya, sort of. And to be precise, the engine was upgraded to 4.0l spec when 90000k ago..................

juarez · 11-14-2003, 00:31

Well, it's getting toward summer, and I've just been talking with another person who's having hot starting problems (and idle hunting).. someone really in the know, what are the major causes and whats the best way to go about diagnosing them?

cArSiK · 11-14-2003, 00:41

F***ing Vapour Lock!

may be of help to you...

Mother Nature · 11-15-2003, 17:06

I have been having this problem in the past week or so :(

Yesterday was very hot here & I had a hell of a time. I took off the air filter & got a mate to check in the barrel (its a 88 cfi EA Spac) there was no fuel showing at all when I tried to start it :(

Proberly not the best thing to do but he dropped a little capfull of fuel & she started without a problem ...... I have now realised this is a fuel problem for sure ......I found that even the hunting had gone too ...... this was great for about 15k's & then all the trouble started again. :(

I have tried that injector cleaner stuff in her ..... but that didnt work ...... so I have got it down to 1 of a few things ....... Stuffed injectors, fuel filter, fuel pump.... all combined with horrid fuel .......

Will keep you posted as I continue to delete the options .....

:fairy

juarez · 11-15-2003, 17:12

Good that you've narrowed it down so much :) And also good that it doesn't _seem_ to be sensor related.. diagnosing and replacing sensors isn't to cheap :(

docomo · 11-15-2003, 19:17

Situation went worse yesterday, seems that it has got something to deal with the ambient temperature.

I've done the alternator as recommended by a mechanics but no help, so it isn't the problem of a faulty alternator.

There is a welch plug leaking in the engine, will see if this is the problem or not tomorrow. And I'll have the mechanic to have the engine compression tested and pressure test the cooling system to see whether the head gasket is gone or not.

To my knowledge, my car's fuel pump was replaced not long ago, so it doesn't sounds very likely that it would be the cause of the problem.