The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1988 - 1998 Chevy & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 02-07-2018, 01:18 PM   #1
mountie
Senior Member
 
mountie's Avatar
 
Join Date: Jun 2011
Location: Bradenton, Fla.
Posts: 878
'88 5.7 TBI .. the TPS ???

Ok, I'm getting confused.

It started when I bought a nice rebuilt TBI 5 years ago. I don't remember if my old TBI had an adjustable TPS on it. The rebuilt has a TPS w/ slotted bolt holes.

After chasing some stalling issues, I decided to find out if the TPS was bad.

The parts houses only show a non-adjustable TPS. But an AC Delco TPS, ( as shown in the "book", and also at the GMC dealer show a non-adjustable TPS.

The problem is the adjustable TPS allows my truck to run better.. after adjusting it. ( but I don't know if it is failing?)

Take a look at your '88 5.7, and let me know if your TPS has slotted bolt holes or not??? ( You should be able to see by looking)
__________________
'70 GTO Midnight Blue
'73 Chevelle Malibu Silver
'88 GMC Sierra SLE Camper Pkg 375,000 & still going!
'93 Cadillac STS Black
'93 Mercedes SL 500 Teal
'96 Honda 550
'86 Yamaha FZ750
'86 Yamaha FJ1200
mountie is offline   Reply With Quote
Old 02-07-2018, 01:50 PM   #2
Mr_Rich
Registered User
 
Mr_Rich's Avatar
 
Join Date: May 2006
Location: Santa Maria, Calif.
Posts: 401
Re: '88 5.7 TBI .. the TPS ???

I think it's the later years the TPS was made non-adjustable but you can slot the holes for adjustment. Small files and a Dremel rotary tool are some of the most useful tools I own. I really couldn't tell if mine is adj. by looking at it since it's kind of buried but I remember I have adjusted it long ago.
__________________
1989 K1500 Chev. EC
Original owner; some of the aftermarket parts I've installed are Borla headers, Hypertech chip, Edelbrock water pump, and a Stillen rear disc brake conversion kit.
2009 Hummer H3T 3.7L 5M.
1997 K2500 Chev. EC 7.4L/ 4L80E
Mr_Rich is offline   Reply With Quote
Old 02-07-2018, 06:06 PM   #3
arrg
Registered User
 
Join Date: Feb 2016
Location: Omaha, NE
Posts: 21
Re: '88 5.7 TBI .. the TPS ???

Not slotted on my 88.
Attached Images
 
arrg is offline   Reply With Quote
Old 02-07-2018, 06:43 PM   #4
mountie
Senior Member
 
mountie's Avatar
 
Join Date: Jun 2011
Location: Bradenton, Fla.
Posts: 878
Re: '88 5.7 TBI .. the TPS ???

Thanks.... I wonder if you can make out a number on It? It should be on the side, that is exposed ( wipe off the dust).... maybe you can still see it ? Apparently, the new one ( AC Delco) I got is bad. ( & a week and a half for a replacement) ???????
__________________
'70 GTO Midnight Blue
'73 Chevelle Malibu Silver
'88 GMC Sierra SLE Camper Pkg 375,000 & still going!
'93 Cadillac STS Black
'93 Mercedes SL 500 Teal
'96 Honda 550
'86 Yamaha FZ750
'86 Yamaha FJ1200

Last edited by mountie; 02-07-2018 at 07:10 PM.
mountie is offline   Reply With Quote
Old 02-10-2018, 06:38 PM   #5
arrg
Registered User
 
Join Date: Feb 2016
Location: Omaha, NE
Posts: 21
Re: '88 5.7 TBI .. the TPS ???

The only number on the side of it is C1664. It's super old though. It might even be original.
__________________
1988 Chevrolet C1500 RCSB
arrg is offline   Reply With Quote
Old 02-10-2018, 07:20 PM   #6
mountie
Senior Member
 
mountie's Avatar
 
Join Date: Jun 2011
Location: Bradenton, Fla.
Posts: 878
Re: '88 5.7 TBI .. the TPS ???

Thanks.... that will help for a cross reference.
__________________
'70 GTO Midnight Blue
'73 Chevelle Malibu Silver
'88 GMC Sierra SLE Camper Pkg 375,000 & still going!
'93 Cadillac STS Black
'93 Mercedes SL 500 Teal
'96 Honda 550
'86 Yamaha FZ750
'86 Yamaha FJ1200
mountie is offline   Reply With Quote
Old 02-10-2018, 11:39 PM   #7
arrg
Registered User
 
Join Date: Feb 2016
Location: Omaha, NE
Posts: 21
Re: '88 5.7 TBI .. the TPS ???

The TPS111DG part number on autozone.com looks to be slotted/adjustable.
__________________
1988 Chevrolet C1500 RCSB
arrg is offline   Reply With Quote
Old 02-10-2018, 11:46 PM   #8
Warrens69GMC
Registered User
 
Warrens69GMC's Avatar
 
Join Date: Jan 2003
Location: Safford,AZ
Posts: 1,410
Re: '88 5.7 TBI .. the TPS ???

found the same one as above poster
__________________
1969 307, t350
1950 Chevy Wagon
Warrens69GMC is offline   Reply With Quote
Old 02-11-2018, 11:32 AM   #9
mountie
Senior Member
 
mountie's Avatar
 
Join Date: Jun 2011
Location: Bradenton, Fla.
Posts: 878
Re: '88 5.7 TBI .. the TPS ???

Quote:
Originally Posted by Warrens69GMC View Post
found the same one as above poster
I will check out that TPS at the store... In photo, they show the front side view only. No photo showing the other side of it. I found some to have the 'arm' on the opposite side, and it turns the other way.
__________________
'70 GTO Midnight Blue
'73 Chevelle Malibu Silver
'88 GMC Sierra SLE Camper Pkg 375,000 & still going!
'93 Cadillac STS Black
'93 Mercedes SL 500 Teal
'96 Honda 550
'86 Yamaha FZ750
'86 Yamaha FJ1200
mountie is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 05:05 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Copyright 1997-2013 67-72chevytrucks.com