I have a 95' trans am i am new to all this i never done this before,i need help and i love working on my car and i just dont like taking my car to the shop i want to try to fix this with your guys help ok so i dont even remember when it started with my car when it sits for a days it starts up fast, and then i drive it around and shut it off it's just hard to start and when it starts up it smells like raw gas,i dont know what it is i tried changing the MAP sensor, and ICM ,and cleaned out the throttle body ,so is there anybody that has had this problem?

 

Have you checked the fuel pressure?

Have you scanned it for codes?

Have you checked to make sure the coolant temp sensor in the water pump housing is showing an accurate temperature?

 

i have not checked the fuel pressure but i have changed the fuel filter i tried to release the fuel pressure from that valve and there was no pressure i thought that was going to be a mess and there was just a small amount of gas that came out, i don't know if that means anything or is that normal ?, as for the scanner i don't have one yet i did buy one i couple years ago and i didn't work,its weird i don't know if need a OBD1 or a OBD2 i have a 95' so i bought a OBD1 and it didn't work and OBD2 is for 96' and newer do you think that it might be the OBD2? . checking the temp on the water pump is whole different problem my fans will not work if plug them into the temp sensor i dont understand why that is i changed the temp sensor and it didnt work,so i just leave it unplugged and the fans are on the whole time the car is running,so what do you think it is? i would appreciate your help or thoughts thanks.

 

i have not checked the fuel pressure but i have changed the fuel filter and i tried to release the fuel pressure and from that valve and there was no pressure i don't know if that means anything to you,and as for the scanner i don't have one yet i did buy one i couple years ago and i didn't work,its weird i don't know if need a OBD1 or a OBD2 i have a 95' so i bought a OBD1 and it didn't work . checking the temp on the water pump is whole different problem my fans will not work if plug them into the temp sensor i dont understand why that is i changed the temp sensor and it didnt work,so i just leave it unplugged and the fans are on the whole time the car is running,so what do you think it is? i would appreciate your help or thoughts thanks.

 

Your car is OBDI with an OBDII port. The '95s confuse a lot of people because of that. The following link shows how to use a scan tool with the regular OBDI connector.

http://shbox.com/1/xraycable.jpg

 

Your 95 (as are all 95's) is OBD-I with a 16-pin OBD-II style ALDL connector. IT is the only year that is that way. Shoebox has a diagram that allows you you connect the 12-pin OBD-I connector to your 16-pin OBD-II connector:

http://shbox.com/1/xraycable.jpg

Note that your OBD-I scanner must be a real scanner, and not just a box with a switch that shorts the ALDL pins to flash the code on the SES light. 93 is the only year that will work on.

AS far as the fans and "disconnecting them from the temp sensor"..... I'll try to explain this one more time. The fans DO NOT connect directly to the temp sensor. They connect to the PCM (computer). The PCM reads the coolant temp sensor, and determines when to turn on the fans. It also uses the coolant temperature to control several other functions, including the transition from "open loop" A/F ratio control to "closed loop" A/F ratio control. It uses the temp to set the idle speed on cold start. It uses the temp to determine the cold start fuel enrichment. If you run this way, your car will be hard to start, it will run excessively rich, wasting fuel, and possibly even damaging the engine by diluting the oil.

HOOK THE COOLANT TEMP SENSOR BACK UP before you screw things up even more. Diagnose the fan problem and fix it. Often, turning on the A/C is enough to provide sufficient cooling, until you can find the source of the problem.

 

This is really getting confusing, because you posted on the "Comuputer Diagnostics....." forum about unhooking the coolant temp sensor to make your fans run, and prevent overheating.

Do you not see the connection between these two threads? You have caused the problems you are asking about in this thread, because you unhooked the collant temp sensor.

PLEASE READ AND UNDERSTAND WHAT PEOPLE ARE TELLING YOU, IN TRYING TO HELP YOU.


https://www.camaroz28.com/forums/sho...d.php?t=766910

 

Thank you injuneer and moparman i under stand now that its the pcm and i will hook the CTS back up and look more into this ,every thing you said injunner is right my oil seems to be thinner,i am going to check out the thermo stat because i remember buying one that was a low temp thermo stat and it didnt look like my old one and i told the person at store if that was the right one and they checked and they said it was the right one so just maybe they were wrong.

 

It does take a specific t-stat. They probably gave you one for the small block Chevy, but it won't work right.

Bookmark Shoebox's site, as there is a wealth of info about the LT1 there.

 

thanks moparman i will bookmark shoebox' link there's alot of good info in there thanks. i hope that injuneer is not pissed at me i still need your guys help. thanks moparman ,shoebox, injuneer

 

i cant believe they sold me some thing like this i just pulled the thermo stat and it's totally different then the normal stock version its a low temp thermo stat i remember now when had that problem with my heater core i changed it for a low temp thermo stat , stupid move on my part i should have just bought the stock thermo stat this ones is short and i a can see from what shoebox has on his web site its not the right one its kinda like the sbc version will now i just need a ride to the store and then i am going to replace it and we will see if that was the problem , i hope this works.

 

it didn't work i changed the thermo stat with on thats just stock and it didnt do any thing and now i am in the same place again the car just gets hot and overheats the fans don't come on and they wont come when turn the A/C on either so , i was talking with a neighbor and he mentioned that it might be my radiator thats plugged up or it has a slow flow or my water pump and if not that the a loose ground wire so i don't know where to start can some help me out has this ever happened to you ?

 

Your thermostat, radiator, water pump, etc. will not prevent the fans from coming on.

Since they come on when the CTS is unplugged, it's also probably not a ground.

Sounds like you need to get a scanner on it to verify CTS operation.

 

Thanks sbs i know its some thing like that or the PCM but what i dont understand is that i changed the CTS but the one i bought was after market so i am thinking that its not the right one for this car , may be the people at the store give me the wrong one is there CTS that looks similar to the Lt1's CTS?

 

Check the resistance of the CTS with Shoebox's procedure:

http://shbox.com/1/4th_gen_tech2.html#ect

Its possible to get PCM scanning software that shows you the readings from the CTS, and shows you whether the PCM has commanded the fans to either low or high speed.

Free software (20 free uses)

http://www.ttspowersystems.com/DataMaster.html

Cable:

http://www.akmcables.com/