« previous next »
Pages: 1 [2]   Go Down

Author Topic: Any TBI experts out there? (New Body Style)  (Read 14242 times)

Offline Dr_Snooz

  • Junior Member
  • ***
  • Posts: 684
  • "I like to take hammers, and just break stuff"
Re: Any TBI experts out there? (New Body Style)
« Reply #15 on: January 17, 2015, 09:11:33 pm »
I don't know. I was neurotic about labeling everything because this was my first domestic rebuild, first big block, first truck, etc. Then when I put it all back together, I found that stupid connector sitting there giving me the stink eye. No label, very short, nothing anywhere close to it. I can only assume that it was some kind of option that my truck doesn't have. Sorta like back in the day, you'd buy a car without a clock but behind the blank-out plate was a wire for the clock. I'm sure I'll figure it out someday when I go to turn something on and it doesn't turn on. I'll spend a week and a half troubleshooting before finding that stupid connector and remembering.
Logged
1989 Chevy Suburban V-2500, 5.7L, TH400

1990 Chevy C-3500 Ext. Cab, 7.4L, 3L80

2009 Chevy Silverado 1500 WT 4WD, 4.8L, 4L60

Offline pholliday1

  • Junior Member
  • ***
  • Posts: 632
  • 1990 V3500 Crew Cab
Re: Any TBI experts out there? (New Body Style)
« Reply #16 on: January 18, 2015, 06:16:36 pm »
Shooting from the hip here but might be some sort of O2 sensor plug
Logged
VETERAN AND LIFETIME NRA MEMBER. WHAT DO YOU STAND FOR?
1991 V3500 CREWCAB SRW 454TBI GMC
1991 v3500 crewcab SRW 454tbi 480le 6" lift
1990 V3500 crewcab Dana 60 FF 14b 5:38 ratio 40 inch 11" lift
1989 v3500 crewcab 454TBI 5" lift

Offline 78BIG-TEN

  • Frequent Member
  • **
  • Posts: 261
  • Newbie
Re: Any TBI experts out there? (New Body Style)
« Reply #17 on: January 19, 2015, 09:28:22 am »
What color is the wire
Logged

Offline DnStClr

  • Senior Member
  • ****
  • Posts: 1806
Re: Any TBI experts out there? (New Body Style)
« Reply #18 on: January 30, 2015, 07:55:38 pm »
engine coolant temp sensor pigtail?   No, after looking at Vile's schematics, the cts is on the front of the engine. 2nd guess is a tach  wiring pigtail.
« Last Edit: January 30, 2015, 08:36:34 pm by DnStClr »
Logged
Don
87 Chevy Silverado

Offline Dr_Snooz

  • Junior Member
  • ***
  • Posts: 684
  • "I like to take hammers, and just break stuff"
Re: Any TBI experts out there? (New Body Style)
« Reply #19 on: January 30, 2015, 09:35:05 pm »
Quote from: pholliday1 on January 18, 2015, 06:16:36 pm
Shooting from the hip here but might be some sort of O2 sensor plug

It's funny you mention it. I broke the O2 sensor while installing the engine and the connector looks exactly the same. I reconnected it when I replaced it though.

Quote from: 78BIG-TEN on January 19, 2015, 09:28:22 am
What color is the wire

Purple. As near as I can tell.

Quote from: DnStClr on January 30, 2015, 07:55:38 pm
2nd guess is a tach wiring pigtail.

Could be that. How would I find out for sure?
Logged
1989 Chevy Suburban V-2500, 5.7L, TH400

1990 Chevy C-3500 Ext. Cab, 7.4L, 3L80

2009 Chevy Silverado 1500 WT 4WD, 4.8L, 4L60

Offline Irish_Alley

  • Tim
  • Senior Member
  • ****
  • Posts: 13333
  • Family is not an important thing. It's everything.
Re: Any TBI experts out there? (New Body Style)
« Reply #20 on: January 31, 2015, 12:58:13 am »
Quote from: Dr_Snooz on January 30, 2015, 09:35:05 pm


Quote from: DnStClr on January 30, 2015, 07:55:38 pm
2nd guess is a tach wiring pigtail.

Could be that. How would I find out for sure?
on my 91 the connection is a male spade connection with a plastic covering and its on the drivers side of the intake coming off the coil i think
Logged
If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline VileZambonie

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 19181
Re: Any TBI experts out there? (New Body Style)
« Reply #21 on: January 31, 2015, 10:28:14 am »
That connector is only used in 4WD applications. Being that it is a C series it doesn't connect to anything. The K series trucks have a 4wd harness which loops this to the EBCM for rear wheel anti-lock.
Logged
,                           ___ 
                         /  _ _ _\_
              ⌠¯¯¯¯¯'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Dr_Snooz

  • Junior Member
  • ***
  • Posts: 684
  • "I like to take hammers, and just break stuff"
Re: Any TBI experts out there? (New Body Style)
« Reply #22 on: February 03, 2015, 09:44:02 pm »
I was wondering if it wasn't some vestigial thing like that. I've been driving it around up the big hills, pulling my trailer and it runs like old times.

Thank you all so very much!
Logged
1989 Chevy Suburban V-2500, 5.7L, TH400

1990 Chevy C-3500 Ext. Cab, 7.4L, 3L80

2009 Chevy Silverado 1500 WT 4WD, 4.8L, 4L60
Pages: 1 [2]   Go Up
« previous next »