Search found 1183 matches

by wxo
Mon Oct 07, 2019 4:25 pm
Forum: Projects
Topic: 2008 Trailblazer SS
Replies: 231
Views: 47037

Re: 2008 Trailblazer SS

It's been two weeks since I last saw a P00128 code and related problems. I say it has been fixed by cleaning the engine temperature sensor connector in the block. Next, I'm working on a very slow AC refrigerant leak. It's been a few months since I topped it off last and I've noticed the outlet temps...
by wxo
Thu Sep 26, 2019 6:28 am
Forum: General Discussion
Topic: 2019 Driving Vacation
Replies: 35
Views: 569

Re: 2019 Driving Vacation

I have an iPhone and would be glad to work with you to see if we can make it happen.
by wxo
Thu Sep 26, 2019 6:05 am
Forum: Races, Swap Meets & Car Shows
Topic: TRP 2019
Replies: 45
Views: 1441

Re: TRP 2019

Congratulations, Fred. Mighty fine job you and Jimmy did! You seem to be piling up the trophies lately. 8)
by wxo
Mon Sep 23, 2019 7:05 am
Forum: Projects
Topic: 2008 Trailblazer SS
Replies: 231
Views: 47037

Re: 2008 Trailblazer SS

I'll just let it ride and see what happens.
by wxo
Sun Sep 22, 2019 6:05 pm
Forum: Projects
Topic: 2008 Trailblazer SS
Replies: 231
Views: 47037

Re: 2008 Trailblazer SS

I'm cautiously optimistic that the engine temp sensor connector was the cause of both these recent problems. I've seen no more of the starting anomalies nor the P0128's with the associated cutoff of the AC.
by wxo
Tue Sep 17, 2019 6:34 pm
Forum: Projects
Topic: 2008 Trailblazer SS
Replies: 231
Views: 47037

Re: 2008 Trailblazer SS

I put a 160° thermostat in there over a year ago until I started seeing the P0128"s. Looking online I saw that some thought that the cause was the low thermostat. Consequently, I put the original thermostat back in. All was OK until now when I began seeing the P0128's again. This brings us up t...
by wxo
Tue Sep 17, 2019 5:13 pm
Forum: Projects
Topic: 2008 Trailblazer SS
Replies: 231
Views: 47037

Re: 2008 Trailblazer SS

I installed a new Stant SuperStat that I had bought many months ago (I don't remember why). The SuperStat is different than your normal everyday thermostat. Here's the marketing material: Unlike conventional thermostats that continually open and close to achieve the proper operating temperature and ...
by wxo
Sat Sep 14, 2019 6:56 pm
Forum: Projects
Topic: 2008 Trailblazer SS
Replies: 231
Views: 47037

Re: P0128 code and lost AC

I drove the truck and made some observations today. I watched the engine temperature display on my UltraGauge. It wasn't long before I noticed that the temperature had not increased above 96.8°. It stayed that way for the 20 minute drive. I also noticed that the ECM stayed in open loop mode the whol...
by wxo
Sat Sep 14, 2019 8:52 am
Forum: Projects
Topic: 2008 Trailblazer SS
Replies: 231
Views: 47037

Re: P0128 code and lost AC

I did a bit of research and came up with this thread which describes what is going on: https://www.chevymalibuforum.com/threads/intermittent-p0128-and-gauge-fail.12036/ This issue also came back yesterday. I believe the original thermostat is currently in the engine now. I have a new thermostat on ...
by wxo
Sat Sep 14, 2019 8:48 am
Forum: Projects
Topic: 2008 Trailblazer SS
Replies: 231
Views: 47037

Re: 2008 Trailblazer SS

Took the TBSS out for the day yesterday and the starting issue seems to have gone away (for now, at least). I'm wondering if I have an injector intermittently leaking fuel pressure. If the problem comes back I'll have to get serious about understanding my fuel system. It came back yesterday. It see...
by wxo
Fri Sep 13, 2019 6:55 am
Forum: Projects
Topic: 2008 Trailblazer SS
Replies: 231
Views: 47037

P0128 code and lost AC

Another thing popped up on my trip yesterday. It was a hot and humid day and the AC suddenly stopped cooling. Then I glanced down at the dash and saw an icon lit in the shape of an analog gauge. I had seen this before in the past and it reminded me that I could circumvent it by resetting the code. I...
by wxo
Fri Sep 13, 2019 6:47 am
Forum: Projects
Topic: 2008 Trailblazer SS
Replies: 231
Views: 47037

Re: 2008 Trailblazer SS

Took the TBSS out for the day yesterday and the starting issue seems to have gone away (for now, at least). I'm wondering if I have an injector intermittently leaking fuel pressure. If the problem comes back I'll have to get serious about understanding my fuel system.
by wxo
Wed Sep 11, 2019 1:32 pm
Forum: Projects
Topic: 2008 Trailblazer SS
Replies: 231
Views: 47037

Re: 2008 Trailblazer SS

Maverick wrote:Maybe a fuel check valve leaking? Maybe try leaving the key on for a few seconds before cranking to see if that fixes it.

Yes. That appears to allow it to start normally. Although, now I have to wait for a few hours to do more testing on that.
by wxo
Wed Sep 11, 2019 1:02 pm
Forum: Projects
Topic: 2008 Trailblazer SS
Replies: 231
Views: 47037

Re: 2008 Trailblazer SS

I recently (about 17k miles ago) replaced the plugs and cleaned the MAF. This thing appears to be related to sitting for some time. Once it starts, I need to wait for a while (maybe an hour or two or overnight) before I can make it happen again. Restarting, it starts quickly (no stumble). It also ru...
by wxo
Wed Sep 11, 2019 9:01 am
Forum: Projects
Topic: 2008 Trailblazer SS
Replies: 231
Views: 47037

Stumbling on engine startup

Within the last 5 days, I noticed a change in behavior at startup. Normally, I do a quick hit with the key and the engine fires and runs instantly. Recently, however, it has been stumbling to life. This stumbling lasts only 1 or 2 seconds then it appears to run normally. it happens intermittently. I...

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