tbi issue
 

Why is my 1989 square body crew cab cold blooded? 454 auto 2 wheel drive

Re: tbi issue
 

It probably has old spark plugs and wires and a check engine light on.

Re: tbi issue
 

Cold blooded TBI is going to run rich. Check the T-stat, should be a 195.

Re: tbi issue
 

Maybe check your temperature sending unit. I believe there're two. On a different, more computerized vehicle, I've had it nearly not start because it couldn't cope with not having that information. Sometimes the computer doesn't guess well. Also, if you don't have a three wire oxygen sensor you might want to switch to that. Especially if you have headers. It takes a little while for the sensor to get warm enough to read correctly. And sometimes headers never get warm enough, depending where the bung is placed. The three wire will warm up the sensor electrically and give you good readings right off the bat. Good luck man, I hope you get it figured out! Let us know.

Re: tbi issue
 

But a OB11 to usb cable and then download WinALDL free software. You will be able to read and flag data and data log. It will take the guessing out of if it is TBI related.

https://winaldl.joby.se/

https://www.amazon.com/ScanTool-OBDL..._t1_B07SR1H4FC

Re: tbi issue
 

Correct me if I'm wrong, but that kind of looks to me like OBD2 paraphernalia. And 1989 ain't gonna be that. I'd love to be wrong, because if you got something that helps me tap-in better to my 1993, I'm all ears!

Re: tbi issue
 

Sorry,,, I think i sent you a wrong link, It is OBD1,,,, I have an 89 suburban also, My cable came from Moates (i think) and I can not find it on their website.

Chris

Re: tbi issue
 

Oh, shoot. Could you put up a picture of your cable with relevant names/numbers if you have a chance? If really like to get in on that.

Re: tbi issue
 

I think i have this one,
http://aldlcable.com/products/aldlobd1u.asp


check this page out,.
http://aldlcable.com/


I do not remember paying so much for it but it was over ten years ago.
chris

Re: tbi issue
 

Thanks! That's great info. You've used the software from the link above?

Re: tbi issue
 

For less than $300 you can buy a used Snap-On MT2500 Scanner good to at least late 90s that does great for this kind of thing. Just another option.

Re: tbi issue
 

5025speed, I hope you don't mind that we've added a little sidetrack in here about getting codes and data from the OBD1 engines.

MARKDTN, thanks for the idea on the snap-on scanner. I've been thinking that I need to pick one of those up, but it does appeal to me to get some visibility into what's going on with the engine. It seems like it's also possible to find out what conditions precipitated the code if I get the cable and hook it up to a laptop. I'll admit I'm intrigued by that.

Re: tbi issue
 

No love for the lowly free paper clip?

Re: tbi issue
 

Haha, a little affection in a pinch, anyway.

Re: tbi issue
 

Great info!