What have you done to your square lately??

[82sbshortbed]

Put tire shine on 3 weeks ago. Still looking good even after several rains and a washing.

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[89Suburban]

Put tire shine on 3 weeks ago. Still looking good even after several rains and a washing.

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What's with the bumper kiss?

 

[82sbshortbed]

What's with the bumper kiss?

What do you mean? He backed into something I assumed on the back bumper but it's on the other side.

 

[89Suburban]

What do you mean? He backed into something I assumed on the back bumper but it's on the other side.

The front bumper

 

[82sbshortbed]

The front bumper

Idk

 

[mxer147]

Brushed some safety orange paint on the cowl drain seal which I resealed a few days ago. A little more prep and paint in that area and I can start the reassembly head scratching.

 

[JamesSam]

After getting the passenger door regulator addressed, I fired her up to see how she would run. I let it warm up, moved it to a good spot for potentially replacing the TPS.
As it has been doing lately the turnover took a good 4 seconds before it ignited, then it settled in and service engine light comes on, but it is idling great at this point. After another minute the service engine light goes out and the idle gets really high. So now I test drive it and it drives great but back in the driveway it is idling high when put in park. So I am more perplexed.
The new AC Delco TPS arrived in the afternoon as expected but I had run out of time to pursue further. The kids were about to get off the bus and tennis, swim practice, and a baseball championship game were next on the list(My son's team won it all again, threepeat!).

Not sure when I will have time to carve out for more troubleshooting as I work the next 9 days in a row and kids are out of school after tomorrow. The rain has not helped here either. Damn it's rained a lot lately.
Should I install the AC Delco TPS and see what happens or seek professional help from my new garage that likes the classics?
I obviously need a voltmeter.

Is there a chance the AC Delco TPS will acclimate to the ECM and TBI just by installing and solve this or is this a larger scope challenge?

 

[AuroraGirl]

Changed out the Valvoline Restore and Protect 5W30 for a fresh batch. Had topped off the last oil change enough times to where I had maybe a quart of my spare 5 quart jug left although I did use a half quart of it in the 4Runner.

So, figured after roughly 1500 miles I would give her fresh and see if she drinks that as heavily.

Then decided to take her to Discount for a tire rotation. I figured that was my last one on these tires and I was going to go with Cooper AT3s. Nope - front left is worn out. So, she is getting 2 more Cooper Evolution M/Ts as I want to maximize my investment on the rears.

IE - I'm cheap.

You must be registered for see images attach

 

[AuroraGirl]

After getting the passenger door regulator addressed, I fired her up to see how she would run. I let it warm up, moved it to a good spot for potentially replacing the TPS.
As it has been doing lately the turnover took a good 4 seconds before it ignited, then it settled in and service engine light comes on, but it is idling great at this point. After another minute the service engine light goes out and the idle gets really high. So now I test drive it and it drives great but back in the driveway it is idling high when put in park. So I am more perplexed.
The new AC Delco TPS arrived in the afternoon as expected but I had run out of time to pursue further. The kids were about to get off the bus and tennis, swim practice, and a baseball championship game were next on the list(My son's team won it all again, threepeat!).

Not sure when I will have time to carve out for more troubleshooting as I work the next 9 days in a row and kids are out of school after tomorrow. The rain has not helped here either. Damn it's rained a lot lately.
Should I install the AC Delco TPS and see what happens or seek professional help from my new garage that likes the classics?
I obviously need a voltmeter.

Is there a chance the AC Delco TPS will acclimate to the ECM and TBI just by installing and solve this or is this a larger scope challenge?

need to know more dude... whats your vin number, i can check if your PROM chip is the correct. knowing your PROM id ahead of time would be helpful, you can find out by opening your PCM and sending a picture of the chip inserted on the board. Knowing what trans and emissions you have (federal, california, altitude) is also helpful. knowing the part number of your PCM is helpful too. its on the outside of the pcm on a sticker if its original

 

[gmbellew]

After getting the passenger door regulator addressed, I fired her up to see how she would run. I let it warm up, moved it to a good spot for potentially replacing the TPS.
As it has been doing lately the turnover took a good 4 seconds before it ignited, then it settled in and service engine light comes on, but it is idling great at this point. After another minute the service engine light goes out and the idle gets really high. So now I test drive it and it drives great but back in the driveway it is idling high when put in park. So I am more perplexed.
The new AC Delco TPS arrived in the afternoon as expected but I had run out of time to pursue further. The kids were about to get off the bus and tennis, swim practice, and a baseball championship game were next on the list(My son's team won it all again, threepeat!).

Not sure when I will have time to carve out for more troubleshooting as I work the next 9 days in a row and kids are out of school after tomorrow. The rain has not helped here either. Damn it's rained a lot lately.
Should I install the AC Delco TPS and see what happens or seek professional help from my new garage that likes the classics?
I obviously need a voltmeter.

Is there a chance the AC Delco TPS will acclimate to the ECM and TBI just by installing and solve this or is this a larger scope challenge?

you need a voltmeter at a minimum. getting a ALDL cable and finding a way to see data with tunerpro on a computer or ALDLDroid on your phone to know what the computer is doing would be a huge bonus. most shops won't be able to read OBD1 computer....so they will be hit or miss unless you luck out and find a good one. for example, voltmeter will let you check TPS, MAP, CTS. but you can't check IAC at all or know what RPMs are. etc.

 

[AuroraGirl]

you need a voltmeter at a minimum. getting a ALDL cable and finding a way to see data with tunerpro on a computer or ALDLDroid on your phone to know what the computer is doing would be a huge bonus. most shops won't be able to read OBD1 computer....so they will be hit or miss unless you luck out and find a good one. for example, voltmeter will let you check TPS, MAP, CTS. but you can't check IAC at all or know what RPMs are. etc.

for reference a tech 2 coverage for a truck starts in 1992 so youd need to use that software and not use a tech 2

A tech 1 or tech 1a or the long defunct aftermarket copies of those tools (made by various companies) also would work

 

[JamesSam]

need to know more dude... whats your vin number, i can check if your PROM chip is the correct. knowing your PROM id ahead of time would be helpful, you can find out by opening your PCM and sending a picture of the chip inserted on the board. Knowing what trans and emissions you have (federal, california, altitude) is also helpful. knowing the part number of your PCM is helpful too. its on the outside of the pcm on a sticker if its original

VIN, I will get back to you. This will be the first time I have heard of the PROM chip at all, if that might explain why I didn't provide more info. I will look in to opening my ECM and sending pics/info.

It's a Flint K truck. 5.7, 350 with 700 R4 transmission. Not California, or Federal emissions. Altitude is near sea level here on the eastern side of VA. If that's what you meant??

Next chance I have to look for the sticker on the PCM for the part number I will.

Thanks for responding.

 

[AuroraGirl]

you need a voltmeter at a minimum. getting a ALDL cable and finding a way to see data with tunerpro on a computer or ALDLDroid on your phone to know what the computer is doing would be a huge bonus. most shops won't be able to read OBD1 computer....so they will be hit or miss unless you luck out and find a good one. for example, voltmeter will let you check TPS, MAP, CTS. but you can't check IAC at all or know what RPMs are. etc.

an inductive tachometer would help with knowing the RPM esp underhood but knowing the TPS counts is very ... helpful here. There is a LOT of revised PROM for 1987-1989 vehicles , the 1988 gmt400 isnt much different from 1987 square so almost all of the fixes span multiple years. Hopefully he says he has a factory PROM and the list from GM shows an update for unstable idle

 

[JamesSam]

you need a voltmeter at a minimum. getting a ALDL cable and finding a way to see data with tunerpro on a computer or ALDLDroid on your phone to know what the computer is doing would be a huge bonus. most shops won't be able to read OBD1 computer....so they will be hit or miss unless you luck out and find a good one. for example, voltmeter will let you check TPS, MAP, CTS. but you can't check IAC at all or know what RPMs are. etc.

I need a Tac.

 

[AuroraGirl]

VIN, I will get back to you. This will be the first time I have heard of the PROM chip at all, if that might explain why I didn't provide more info. I will look in to opening my ECM and sending pics/info.

It's a Flint K truck. 5.7, 350 with 700 R4 transmission. Not California, or Federal emissions. Altitude is near sea level here on the eastern side of VA. If that's what you meant??

Next chance I have to look for the sticker on the PCM for the part number I will.

Thanks for responding.

the VECI underhood on the core support or your air cleaner should say "THIS VEHICLE CONFORMS TO EPA REGULATIONS FOR THE 1987 MODEL YEAR (or High Altitude, or California CARB)" at the bottom