Retro's 1989 GMC Sierra C1500 Sportside Indy clone

[Old77]

solid for sure! Hopefully this is a long term project that we get to see completed with it's retro mods

 

[foamypirate]

Looking good, Senor.

 

[Jims86]

Ya know!?

 

[Jims86]

Thanks Jason. I just need to work out a few bugs here and there. Running rich as hell right now but the thermostat is stuck open for some reason which is the cause, I am sure.

Whats the datalog say?

 

[RetroC10Sport]

I need to run a datalog and see what it says. I know the BLMs were around 111-123. And I had a code 45 yesterday, o2 reading rich.

 

[Jims86]

I need to run a datalog and see what it says. I know the BLMs were around 111-123. And I had a code 45 yesterday, o2 reading rich.

123 ok for warm up, but 111? Fock. Thats a little deeper than the cts. Sounds like that pig rich gremlin we have had to help a few others chase.

 

[RetroC10Sport]

BLMS at 108 when idling at 180F. WTF?

 

[89Suburban]

What does this all mean?

 

[RetroC10Sport]

Optimal BLM is 128. The lower the number, the richer it runs and the higher the number, the leaner it runs.

Still getting a code 45. New o2, CTS, thermostat, cat, MAP, EGR and solenoid, rebuilt TBI.

 

[Jims86]

Optimal BLM is 128. The lower the number, the richer it runs and the higher the number, the leaner it runs.

Still getting a code 45. New o2, CTS, thermostat, cat, MAP, EGR and solenoid, rebuilt TBI.

Why is there an IAT reading?

 

[RetroC10Sport]

Your guess is as good as mine.

 

[RetroC10Sport]

Changed EGR yesterday and it ran great last night and this morning. This afternoon I was going to try to drive it to Cedar Park and about 10 minutes later, the SES light came (45) on and was running rough again.

 

[RetroC10Sport]

Of course, I could probably get a better handle on things if I switched over to 1227747 instead...I do not know why WinALDL was on that ECM.

 

[Jims86]

Optimal BLM is 128. The lower the number, the richer it runs and the higher the number, the leaner it runs.

Still getting a code 45. New o2, CTS, thermostat, cat, MAP, EGR and solenoid, rebuilt TBI.

Why is there an IAT reading? BLM and INT are both low....the ECM is asking for extra fuel for some reason.

 

[Jims86]

Of course, I could probably get a better handle on things if I switched over to 1227747 instead...I do not know why WinALDL was on that ECM.

Whoa...what ECm DOOOO you have?