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mountie · 02-07-2018, 01:18 PM

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)

02-07-2018, 01:18 PM	#1
mountie Registered User Join Date: Jun 2011 Location: Bradenton, Fla. Posts: 1,100	'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 '88 GMC Sierra SLE 392,000 miles-(2018) sold to Classic car shop in Germany. '93 Cadillac STS Black '93 Mercedes SL 500 Teal '86 Yamaha FZ750 - 15,000 RPM '86 Yamaha FJ1200 - Criminally Fast 2016 Ferrari 488 GTB, I drive it - don't own it. '05 GMC Yukon XL , SLT 4wd ( just purchased 2018)