[100mphRay]

New here in las vegas nv was wondering if i could find intelligent life in these forums ive got a 97 chevy c2500hd with a 4l60e trans stuck in limp mode ive changed both vss sensors neutral safty switch,speedo and computor all for less than 200.00 its all in who u know....stil only have 3rd gear candownshift to 2nd &reverse speedo is intermitant as well as tach lights only come on in nuetral..i was told therewas a secondary computor board under the dash in a rectangular box and a relay that could be bad any help would be appreciated

 

[RayVoy]

You know the wrong people.......you need tech friends, not parts friends, haha.

Welcome

 

[100mphRay]

True most of are shop owners telling me check this check that

 

[100mphRay]

Now im reading thats it cold be the tps?

 

[100mphRay]

Could*

 

[100mphRay]

You know the wrong people.......you need tech friends, not parts friends, haha.

Welcome

Most are shop owners telling me check this check that now im told about a secondary board under the dash or a relay ?

 

[100mphRay]

Most are shop owners telling me check this check that now im told about a secondary board under the dash or a relay ?

And thanks this could be a fun forum to hang out in

 

[thegawd]

Welcome to the club Ray! Well I've been there n done that. It was my ignition switch. The tps would not allow it to shift out of first or it would delay shifting. The tps can be easily tested. I don't know how to test the ignition switch. What is happening is your tranny is loosing power. it could be any of the following... ignition switch, tranny plug, prndl fuse in the end of the dash or the pink wire that runs from the main plug that the ignition switch plugs into that runs to the fuse box and then off to the tranny. I have a thread on here called limp mode = failed ignition switch or something like that.

Have a good one!

Al

 

[100mphRay]

Welcome to the club Ray! Well I've been there n done that. It was my ignition switch. The tps would not allow it to shift out of first or it would delay shifting. The tps can be easily tested. I don't know how to test the ignition switch. What is happening is your tranny is loosing power. it could be any of the following... ignition switch, tranny plug, prndl fuse in the end of the dash or the pink wire that runs from the main plug that the ignition switch plugs into that runs to the fuse box and then off to the tranny. I have a thread on here called limp mode = failed ignition switch or something like that.

Have a good one!

Al

 

[100mphRay]

Thank you for your advice I'll try that next cuz im lost at this point . now i have a direction to run with I'll let u kno how it goes

 

[thegawd]

Np. I was in a hurry earlier... One other thing Ray is I had a check engine light n like 6 tranny codes. Have you checked for codes? You should have them too.

Al

 

[thegawd]

That pink wire I was talking about that comes from he fuse terminates on pin E at the tranny plug. It brings the only 12v positive connection to the tranny, all the other wires are negative connections that turn the different functions/solenoids on or off.

You could test the voltage on pin E to see if you have any, use a small drill bit n simply ground out to the case. It should be the same voltage as the battery, any different n it wont work.

If no voltage check the fuse. Actually I guess you should check the prndl (maybe) fuse 19 in the end of the dash first. If its good check for voltage. If no voltage or weak voltage them the problem lies between the fuse and the ignition switch.

Good luck!

Al

 

[100mphRay]

That pink wire I was talking about that comes from he fuse terminates on pin E at the tranny plug. It brings the only 12v positive connection to the tranny, all the other wires are negative connections that turn the different functions/solenoids on or off.

You could test the voltage on pin E to see if you have any, use a small drill bit n simply ground out to the case. It should be the same voltage as the battery, any different n it wont work.

If no voltage check the fuse. Actually I guess you should check the prndl (maybe) fuse 19 in the end of the dash first. If its good check for voltage. If no voltage or weak voltage them the problem lies between the fuse and the ignition switch.

Good luck!

Al

 

[100mphRay]

Thanks gawd, ill be working on it tomarro morn vegas time no codes except a tps low voltage code other than that nada...i checked the fuses for the ecu 1&2 #19&20 all good is there a relay somewhere im missing??il check power to the pink tom morn . let you knohow it goes thanks again

 

[thegawd]

The tps is very important when it comes to shifting, that needs to be investigated. If you dont have codes for the tranny it is receiving power....

 

[xPosTech]

TPS

Ted

 

[kennythewelder]

Welcome to the forum

 

[100mphRay]

Ok ted i traced the pink wire from the starter box in the colom have power from there to pcu from there to nutral saftety swicth pwer to the plug. Where i dont have power is the two small pink wires in the mass plug in in the back nada nothin what now ? Oh btw this is ray w the 97 chevy stuck in limp mode

 

[100mphRay]

Welcome to the forum

Thanks nice to meet other chevy lovers

 

[100mphRay]

TPS

Ted

Btw i checked tps fine