won't start sometimes

[souphmars]

itonly does it ever now and then- it tries to start, it cranks but it never starts- it will get drove, then it will get turned off like at a store or something- he will go inside, come back out to leave and it won't start- its weird- it runs like nothing is wrong, and it is inconsistent- it is almost like something has to cool off or something, but it never shuts off or anything while he is driving- this is my dad's- has anyone ever had this problem or something similiar- he has replaced many parts- it is a 1990, with a ton of miles

[ctesla]

is this a 4.0l (straight six)?
manual or auto?
have heard of a "heat sensor" behind engine near bell housing for transmission...

I can fax or email a schematic
chris
[email protected]
ASE cert.instructor

[ctesla]

Originally Posted by ctesla

is this a 4.0l (straight six)?
manual or auto?
have heard of a "heat sensor" behind engine near bell housing for transmission...

I can fax or email a schematic
chris
[email protected]
ASE cert.instructor

...sorry...
meant to say "crank sensor" acting up from heat behind the engine...

but, you should look into other posts in this forum, as it appears you are not alone...
cracked coils, throttle positioning sensor, could also be a failing electronic control module, etc.
heat does play a harsh role under the hood..
hope this helps.

[simoncs]

Originally Posted by ctesla

...sorry...
meant to say "crank sensor" acting up from heat behind the engine...

but, you should look into other posts in this forum, as it appears you are not alone...
cracked coils, throttle positioning sensor, could also be a failing electronic control module, etc.
heat does play a harsh role under the hood..
hope this helps.

Hi

I had same problem- sometimes starts sometimes not - turned out to be the inhibitor sensor was not working properly.
This prevents the car starting in gear.
all you need to do is wiggle the transmission/gear stick back and forward (while it is in Park) while turning the key.

[89ltd]

also known as the nss switch, but if it was faulty, the engine would not crank at all. I would say it is the crank sensor or pickup coil in the distributor, get yourself a spark tester and check for spark when it won't start, go from there.

[souphmars]

it is an auto inline 6

[souphmars]

he just replaced the pickup coil- he is looking to see what the crank sensor is

[souphmars]

is it a crankshaft position sensor???where is it exactly located- i need to know the exact location, so i can explain it to him

[Dale Aeppli]

Originally Posted by souphmars

is it a crankshaft position sensor???where is it exactly located- i need to know the exact location, so i can explain it to him

http://www.autozone.com/images/cds/g...3d80152484.gif

the crankshaft sensor is located on the drivers side , on the bellhousing , right above the front driveshaft. Check this site hope it helps Dale [email protected]

[souphmars]

thanks will try replacing and will give u an update later-i tried searching for the same problem in other posts and could not find it

[Dale Aeppli]

Originally Posted by souphmars

thanks will try replacing and will give u an update later-i tried searching for the same problem in other posts and could not find it

Questions just holler [email protected]

[widglid96]

HAVE YOU FOUND THE PROBLEM YET?
i HAVE THE SAME THING GOING ON WITH MY 1990,
HAVE PUT IN A NEW DISTRIBUTOR,COIL,ECM,CRANKSENSOR AND STILL KEEPS DOING IT,

[FlatLanderHandicap]

I have the same problem with a 92 laredo 4.0L. It will start fine and then 5 min later when i get out of the store it doesnt start. I'm gonna check out the TPS b/c I also have issues with shifting from 2nd to 3rd. Hopefully 2 birds with 1 stone eh!

[widglid96]

Well I Replaced The Starter Relay, And Havent Had Any Problems Since, It May Have Been That Or Just Cleaning The Connections While Replacing That Did The Trick.

[FlatLanderHandicap]

I cleaned the throttle body and checked the connections on the TPS, my shifting problem is fixed but the sometimes not starting problem is still there. Whats the starter relay? where is it? how much did it cost you?