93 J30 wont start...whats wrong???

[ceenotes1]

i posted this problem last week and didnt get too many responses. let me try again. after driving and running around town for a few hours came home and shut the car off. came back out 30 - 45 min later and car would not start. it cranks but just wouldnt start for the rest of the night. woke up the next day and it started right up! (weird) i let it warm up then drove it for about 10 min. shut her down for about a min or two and would not start back up. i let about 5 hours go by then it started right up again!!! this time after i shut it down again it started back up. ran fine for about two days then out of no where i pull into a gas station last nite, shut it down, filled up and it would not start back up!!! came back this morning and still wouldnt start. had to get it towed home and it still wont start as of this minute. just keeps cranking but wont start. battery is starting to die out from trying to keep starting it. is this fuel related or a problem with the coolant temp. sensor. maybe sensor is telling cmptr engine is too hot and wont let it start up??? i just bought the car 2weeks ago with 119k. changed all belts incl. timing , oil Mobil synth blend 10w30, filters air and oil, denso plugs, 1 pcv valve (couldnt get to the other one) and when it WAS running, it hesitated a little (alot at times)from a stand still before and after the tune up. my friend has the same year car and is very quick off the line. i couldnt even get in front of a loaded work van the other day when i pulled up next to him at a red light the other day!!! how embarrasing!!!!!!

HELLLLLPPPPP!!!!!!!

[PalmerWMD]

Ok Online Mechanics, got your work cut out for you.

Fred...

[juiceman]

did the car run right before the timing belt change?

[Q451990]

You really need to consider getting a Consult test run to see what's going on. How did the plugs and other parts you removed during your overhaul look?

Heath

[VimyJ]

Car won't restart immediatley? Sounds like it's flooded. Have you tried to restart using the proper flooded condition start proceedure?

Could be a fuel injector(s).

USE OEM SPARK PLUGS ONLY! This could definitely be the source of your trouble.

[Q451990]

...the proper flooded condition start proceedure

Which is floor it and turn the key until it starts. The ECU "sees" via the TPS that you've floored the accelerator in a starting situation and doesn't hit the cylinders with more fuel from the injectors.

Heath

[Eswift]

i agree. could very well be flooded (leaking injector)

also could have some other fuel problem fuel press. regulator or damper or fuel pump on the fritz. best to first make sure there are no error codes.

[Mayhem_J30]

Which is floor it and turn the key until it starts. The ECU "sees" via the TPS that you've floored the accelerator in a starting situation and doesn't hit the cylinders with more fuel from the injectors.

Heath

this has worked for me before.

mechanics- is it possible for the J30 to be stuck in Cold idle? So even after warm up when shut down it floods from running rich?

[AZhitman]

Bump for Mr. Notes.

My advice would be drop $100 on a Consult diagnostic at the dealer, then post the results here so we can walk you through the repairs.

[scl]

To the original post:ceenotes1, I got into exactly the same situation today with my '92 G20. I pull in a gas station and it won't start after I fill it up and then I have this same intermitent start/not start problem, Do you figure out what go wrong with your car?

[elwesso]

Actually, on my Q, the previous owner had the same problem.... Ended up being the fuel filter ($10 from joe)... But chances are it has put a lot of strain on the pump...... Im sorry, i forgot to mention it earlier!!

[autotech43]

A consult test would most likely give you the info you need, sounds like you have either a connection problem (intermittent open circuit) or I have seen the camshaft pos sensor do what you are describing. Sensor is located on the front of the drivers side head and connects to the exhaust camshaft. Since you unplugged the sensor to change the timing belt, check the connector to make sure it is fully seated. Not getting too deep here, there is a LED type light inside the sensor that shines through a metal plate which sends a signal to the ECM, have seen when the sensor gets hot, it will open the circuit and shut things down, When the engine cools things go back to normal operation. If you don't want to have the vehicle scanned, next time the vehicle won't start and the engine is at operating temperature, pour some cold water on the sensor and try it again. Be surprised how you can diagnois certain things when you dont have the proper diagnostic equipment. That was from the old school...........

[richsuff]

Has anyone ever come up with the reason why this happens?These same symptoms happened to my 93 J30 in Nov. Ran a diag. scan, cool temp sensor code came up, replaced sensor and plugs. Car ran fine until last Sat., same symptoms, still wont start. Can anyone tell me how they fixed their problem? Car still wont start, car has been sitting since last Saturday with the avg temp at 27 degrees, so the car being hot is not the problem. With a SNAP ON scanner tricked the ECM so that the ECM believed the car was at 151 degrees and the car started. But no codes on the scanner (code 55,which is normal comes up) nor is the check engine light is coming on. Does anyone have any ides?

TIA