engine overheating of my pontiac transport 1990

[vijayan]

i din,t undestand hoe to read the is any other way you can find out codes

[vijayan]

how do i know the know the codes

[vijayan]

ok i did all the things u told me too they dont show anythin nothing blinks nothing

[LMP]

COnnect A and B as shown with key OFF
TUrn KEY ON (do not start engine)
One light on the dashboard will start flashing 1 bip, then 2, wait, 1 bip, 2 more, wait, 1 bip, 2 more.....this is code 12 repeated 3 times just to tell you the computer has accepted diagnostic mode.
Then any stored codes will flash the light like code 34 would be 3 bips, wait then 4 bips, wait and repeat 2 more times...thehn nesxt code if any
If all it flashes is code 12, it means there are no stored codes.
THis is THE way to do it. Real simple and easy.

then the codes can be interpreted using this:
www.avigex.ca/xport/codes31.jpg

ahh OK I read your message after posting this.
ANyway, the codes if any would have been interesting, but they do not reveal mechanical conditions anyway. I ,might have expected a code 21 or 22 because of the high idle, a possibility, but
YOU still have the overheating problem...
You will have to investigate....so use the hints I told above to check for causes .

[vijayan]

i connected the wires to the comp it didnt show anythin pls help reply

[vijayan]

[quote=vijayan]i connected the wires to the comp it didnt show anythin pls help reply

[vijayan]

nothing at all theres no flashing watsoever
please help please

[vijayan]

wats the normal oil temprature for the pontiac 1990 mine came up to 60 when i started it

[LMP]

What did you used to join connectors A and B? a small wire or paperclip...? ANyway, FOrget about the codes....not an issue here..but I wonder why at least it does not show a code 12.....

Originally Posted by vijayan

wats the normal oil temprature for the pontiac 1990 mine came up to 60 when i started it

Well there is no oil temperature...there is oil pressure gauge and engine temperature gauge.

The oil pressure indicator is a fake on the 3.1....it is just a pressure switch on the engine and if there is some pressure, it contacts and will show always the same "pressure"....but is it meaningless...except to say you do have "some" pressure.

[vijayan]

do you know any site in which you get the owner,s manual or that hayne,s repair manual to download for this car i went to mygmlink.com but it,s only there till the 1993 any other site with pontiac 1990 owner,s manual

[LMP]

repair manual is like 2000 pages....so any printout would cost more in ink than buying the manual from e-bay.com There are several authentic GM manuals available almost at any time with keywords "pontiac transport manual" - both user and repair - . Service manual 90-91 covers just the 3.1 but the 92-95 pair keeps covering the 3.1 in addition to the 3.8 and all are compatible with your needs.


ANyway data can be downloaded from www.autozone.com ; there is some interesting info but a large part is generic ..somewhat like Haynes or Chilton ...and may or may not apply to your specific car, and details are scarce. ALso try http://www.carspace.com http://www.chiltondiy.com/

Finally, there are several diagrams and other info on my site at
www.avigex.ca/xport

[vijayan]

hey i need your help fast

[LMP]

Originally Posted by vijayan

..my pontiac still overheats while in motion
.. it alwayas..shake rapidly when i stop the car in the traffic light
...when i start the car in the garage the side wall gets extremly black from the exhaust
..friend ...had some electrical work and some othe work witch i have forgotten
...the car now does not get off does not shake and the smoke comming from the exhaust is not that black anymore
...after a week the car started to shake a little when .. not in motion
...the temprature goes high and the car is not smooth

These conditions most probably would not be resolved by reading codes. Not being able to read the codes as was explained before might indicate a problem with the computer itself... which cannot be resolved by other means than replacement.. I'd like to hear the exact description of how you tried it : did you read and apply the exact procedure from the link www.avigex.ca/xport/readingcodes.jpg I posted before ?
Did you try to run the engine WITHOUT the thermostat as I asked before?..and report what happens.
OR/and top off the radiator, leave cap off, run engine and look for bubbles exiting the radiator.Let a helper throttle up the engine in rapid surges while you watch.
Having a compression test might procure some information, specially if a cylinder happened to be much lower than others

[vijayan]

i grounded the computer properly and when i turned the car nothing happened hey i found out that the previous owner of the car unplugged the cable which light,s up the light of the service engine soon light and the rest except the brake light which semms to come on.................

i don,t think the computer has any problem i think the wires are just unplugged i found out this by putting the ignition to on (I.E in the run postion) and i lifted opened the liftgate the light din,t get on if you could just tell me where i can find the wire,s under the hood with some pictures or something

thanx for any answer,s in advance

[vijayan]

expecting an answer fast