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Discussion Starter #1
OK, now I have a repeat on the trouble codes. Yesterday the P022, P070, P071 surfaced again. The problem is worsening, and the drivability is questionable. I have to get this fixed before it gets any worse.

The P022 is a Throttle Position Sensor related, and the 70 and 71 are related to the MAP sensor from what I am told. It sounds like the TPS is the first thing I should address as it could be tripping the others. Is this what others have seen? How difficult is it to remove and install a new TPS? If I am looking at the correct part, it looks like I would have to remove the bracket for that upper engine mount (torque bar?). This bracket is bolted down through a small coolant fitting of some sort (strange setup) :confused: Well, I was going to drain and flush the coolant and put the additive in there anyway...

I guess what seems strange to me is that this TPS could make this thing run rough (chugging), and create this surging like this. I hope it is this simple, would love to have that smooth pawer of the Northstar back in the saddle! :eyebrow:
 

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Discussion Starter #2

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No luck this time!

Well, I tried replacing the TPS Throttle Position Sensor yesterday. Sadly, it did not cure the condition. It has not given me any trouble codes yet, but I'm sure it will eventually. It still runs and drives the same way. :suspense:

I'm not sure where to go from here, any suggestions? :basketcase:
 

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Re: No luck this time!

sprucegoose said:
Well, I tried replacing the TPS Throttle Position Sensor yesterday. Sadly, it did not cure the condition. It has not given me any trouble codes yet, but I'm sure it will eventually. It still runs and drives the same way. :suspense:

I'm not sure where to go from here, any suggestions? :basketcase:
If your computer system is operating properly, and there are no codes, then the problem is in the basic mechanical systems. Back to basics. Everybody always assumes that the problem is with something computer-related but often it's not.
 

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Re: No luck this time!

Katshot said:
If your computer system is operating properly, and there are no codes, then the problem is in the basic mechanical systems. Back to basics. Everybody always assumes that the problem is with something computer-related but often it's not.
Yes, this is true. It may be something as simple as plug wires, or a plug itself. I have to open my eyes to all possibilities here.

What just seems so strange is that one day it was great, the next day this shows up with all these codes. Another funny thing, it happened when my wife had the car! This is a fairly common occurence. Do you think my Eldo is trying to tell me something? :eek: My wife is always saying "Sure, it never happens when you are driving the car!" Other than the time my oil pump died in my 70 Firebird and I spun a rod bearing... :crying:

Dave
 

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Got it!

Sure enough, it was something basic that I should have been concentrating on hear from the beginning. I replaced the plugs and wires with good ol' AC Delco OEM parts and this thing runs like a dream! :D Also, pays to talk to you local dealer about matching or coming close to the online prices. Next day parts at $12 over gmpartsdirect.com price. I'd rather give them my business if they can do that...

Of course the 2 plugs I pulled early on in this investigation were probably the best of all eight! There was one that the platinum tip was completely gone, and one that was very near that. The original owners had replaced the wires with a Packard set, and those looked pretty worn in several areas as well.

The plugs that I took out were 41-947 where the dealers call for 41-950. Not sure what the difference is, but all I know is this motor has the smoothest power I ever felt! The car has 157K on it, what was it like new?! :cool:

Thanks again for the suggestions guys. Katshot you hit the mark here! Great board and a lot of knowlegeable people here! :worship:
 

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Re: Got it!

Sure enough, it was something basic that I should have been concentrating on hear from the beginning. I replaced the plugs and wires with good ol' AC Delco OEM parts and this thing runs like a dream! :D

Well - my 94 SLS is doing the same thing yours was and the same codes. I was stumped because I also had a hard time thinking the TPS was causing the chug/hesitation. I guess it not a bad idea to start with the easy stuff first like plugs and wires.......I'll give it a try and I HOPE I have similiar praises!! hahaha - thanks for posting.
 
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