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Search: Posts Made By: singlewc
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Forum: 1st Generation S-series (1983-1994) Tech
04-10-2010, 04:50 PM
Replies: 10
Views: 14,197
Posted By singlewc

I think what made me such an easy mark for my...

I think what made me such an easy mark for my kids to say "forget it" was the notion of the harness being shorted, or open, or a sensor being bad. The problem with that scenario is, if any of those...
Forum: 1st Generation S-series (1983-1994) Tech
04-09-2010, 08:17 PM
Replies: 10
Views: 14,197
Posted By singlewc

What symptoms do you have? Are you seeing what I...

What symptoms do you have? Are you seeing what I have been seeing and dealing with.

We loved that truck. Daughter cried and cried when I told it was sold, but there comes a time when you reach...
Forum: 1st Generation S-series (1983-1994) Tech
04-09-2010, 03:51 PM
Replies: 10
Views: 14,197
Posted By singlewc

All I found was that something in the wiring...

All I found was that something in the wiring harness, or in one of the attached sensors, was blowing up the ECM. I replaced it and the same issue, 1.5V at the input line to the ECM for the O2 sensor....
Forum: 1st Generation S-series (1983-1994) Tech
03-30-2010, 12:28 PM
Replies: 23
Views: 3,725
Posted By singlewc

at $50 a pop, you are talking pretty big bucks...

at $50 a pop, you are talking pretty big bucks :-)

The definition of insanity is doing the same thing over and over, and expecting different results. I have gone over everything I can find, used...
Forum: 1st Generation S-series (1983-1994) Tech
03-15-2010, 11:21 AM
Replies: 23
Views: 3,725
Posted By singlewc

That might be a really big help, if the info is...

That might be a really big help, if the info is in there somewhere. The place I am stuck at is, not knowing what voltage to find on each pin for the ECM, whether its ground, 12V, or something in...
Forum: 1st Generation S-series (1983-1994) Tech
03-14-2010, 01:18 PM
Replies: 23
Views: 3,725
Posted By singlewc

The 13 is all I get. That is the O2 sensor code....

The 13 is all I get. That is the O2 sensor code. When I replaced the ECM, it got toasted, and does the same thing so its practically impossible to fix the electrical problem that bangs the ECM, since...
Forum: 1st Generation S-series (1983-1994) Tech
03-12-2010, 07:18 PM
Replies: 23
Views: 3,725
Posted By singlewc

Dredging up an old issue :-) The way to go...

Dredging up an old issue :-)

The way to go was to back off, hide the truck in the garage, and think about what to do. That brings me back here to ask a question of the experts.

Toying with...
Forum: 1st Generation S-series (1983-1994) Tech
02-18-2010, 08:06 PM
Replies: 23
Views: 3,725
Posted By singlewc

I put forth the notino that I might have, or must...

I put forth the notino that I might have, or must have damaged something in the harness when I put the engine back in, but I have no proof of that, other than the things I am seeing.

I agree with...
Forum: 1st Generation S-series (1983-1994) Tech
02-18-2010, 10:32 AM
Replies: 23
Views: 3,725
Posted By singlewc

Yes. It is comes -out- of the ECM terminal pin...

Yes. It is comes -out- of the ECM terminal pin that is the purple wire, which connects to the O2 sensor. It doesn't come from the sensor, or the wire itself. It comes into the ECM, through something...
Forum: 1st Generation S-series (1983-1994) Tech
02-18-2010, 12:43 AM
Replies: 23
Views: 3,725
Posted By singlewc

Hi, and thanks for jumping in. The O2 sensor...

Hi, and thanks for jumping in.

The O2 sensor is hooked to the purple wire, that goes to the larger, of the two connectors. At the moment, I am in my jammies, and can't see the manual, so I cannot...
Forum: 1st Generation S-series (1983-1994) Tech
02-17-2010, 10:36 PM
Replies: 23
Views: 3,725
Posted By singlewc

Absolutely not a problem. I know you were...

Absolutely not a problem. I know you were helping. No way to tell who you are talking to. I just wanted to find a way to make it known I am not a newbie. No big thing.

Picture this. the ECM is on...
Forum: 1st Generation S-series (1983-1994) Tech
02-17-2010, 06:48 PM
Replies: 23
Views: 3,725
Posted By singlewc

That would keep the light off, bu it won't pass...

That would keep the light off, bu it won't pass the emissions test if its not in closed loop, since its running full rich, thinking the the sensor is bad. :-(

I believe Gimpy Blazer has said he...
Forum: 1st Generation S-series (1983-1994) Tech
02-17-2010, 11:31 AM
Replies: 23
Views: 3,725
Posted By singlewc

Thanks. I appreciate the ideas. I have gone over...

Thanks. I appreciate the ideas. I have gone over the grounds and power lines and found no problems. Not sure how to phrase it, because I really like input and am grateful for things to try, but I am...
Forum: 1st Generation S-series (1983-1994) Tech
02-12-2010, 08:52 PM
Replies: 23
Views: 3,725
Posted By singlewc

This AM, I went to the junkyard and bought...

This AM, I went to the junkyard and bought another ECM. They 'claim' that they test them all in working vehicles, no returns, $50. What can I do, gotta start somewhere, so I brought it home and...
Forum: 1st Generation S-series (1983-1994) Tech
02-12-2010, 04:01 PM
Replies: 23
Views: 3,725
Posted By singlewc

I think I have to send my truck to the scrap yard..... anyone got an idea?

1988 S10 Blazer, 2.8l, auto, 4wd.

I live in Utah, where emissions testing is mandatory. I guess I have a major electrical harness issue, because my ECM shows 1.5V on the pin where the O2 sensor...
Forum: 1st Generation S-series (1983-1994) Tech
02-09-2010, 09:22 PM
Replies: 10
Views: 14,197
Posted By singlewc

Thank you. I put a scope on it, and saw some...

Thank you. I put a scope on it, and saw some oscillation, but the scary part was the amount of voltage the sensor was putting out.

I verified the connection from the sensor through the harness to...
Forum: 1st Generation S-series (1983-1994) Tech
02-08-2010, 08:27 PM
Replies: 10
Views: 14,197
Posted By singlewc

Hi folks, I get the check engine light after...

Hi folks,

I get the check engine light after the warmup and it goes closed loop. The standard paper clip in the code interface tells me that I have a code 13, which is an O2 Sensor. Being a good...
Forum: 1st Generation S-series (1983-1994) Tech
01-28-2010, 11:19 AM
Replies: 14
Views: 25,972
Posted By singlewc

Yup. I replaced the Ignition Control Module and...

Yup. I replaced the Ignition Control Module and it fired right up. Thank for pointing out that it existed :-) I didn't realize it was there.

I took the old one to three Autozone stores before I...
Forum: 1st Generation S-series (1983-1994) Tech
01-26-2010, 10:43 PM
Replies: 14
Views: 25,972
Posted By singlewc

Had to go to three Autozone stores to find one...

Had to go to three Autozone stores to find one whose test equipment was functional. Finally found one that was working and the tested the ignition control module three different times and it failed...
Forum: 1st Generation S-series (1983-1994) Tech
01-24-2010, 05:38 PM
Replies: 14
Views: 25,972
Posted By singlewc

You patience is appreciated :-) So there is...

You patience is appreciated :-)

So there is a pickup coil, and an ignition module. The ignition module, or control module is an easy in and out, but the distributor has to come out to replace the...
Forum: 1st Generation S-series (1983-1994) Tech
01-24-2010, 11:36 AM
Replies: 14
Views: 25,972
Posted By singlewc

I was reading that section, and it explains a...

I was reading that section, and it explains a cheap method to test the coil, which may or may not be reliable, and I hate to sound dense, but are you are talking about something else in addition to...
Forum: 1st Generation S-series (1983-1994) Tech
01-23-2010, 08:20 PM
Replies: 14
Views: 25,972
Posted By singlewc

I do believe I have learned something valuable...

I do believe I have learned something valuable today :-) I am optimistic that the ignition module is the culprit, since I have been over most every other portion of the ckt I can think of, but didn't...
Forum: 1st Generation S-series (1983-1994) Tech
01-23-2010, 07:35 PM
Replies: 14
Views: 25,972
Posted By singlewc

I have a Chilton Manual, can't find a GM shop...

I have a Chilton Manual, can't find a GM shop manual. The chilton has block diagrams of the electrical, but obviously, they are not very good because they show no mention of the ignition module,...
Forum: 1st Generation S-series (1983-1994) Tech
01-23-2010, 06:10 PM
Replies: 14
Views: 25,972
Posted By singlewc

Do I have an ignition module? I thought those...

Do I have an ignition module? I thought those were only for those without real caps and rotors? Shows you what I know <shrug>

No codes. I have removed the ECM to try and find any broken wires in...
Forum: 1st Generation S-series (1983-1994) Tech
01-23-2010, 05:03 PM
Replies: 14
Views: 25,972
Posted By singlewc

88 S10, No spark from coil

Got a 1988 S10 Blazer, 2.8l, and was driving along, and she just die and won't restart. Cranks okay, got gas, but no spark out of the coil

Did some checking, and found 12V at the coil from the...
Showing results 1 to 25 of 25


 
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