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Forum: 1st Generation S-series (1983-1994) Tech

06-22-2010, 09:57 AM

Replies: 11

Losing Timing

Views: 4,297

Posted By tweet

I replaced the knock sensor while I was replacing...

I replaced the knock sensor while I was replacing the dist,one of the two fixed it. Thanks for the reply,Pop's

Forum: 1st Generation S-series (1983-1994) Tech

06-21-2010, 05:27 PM

Replies: 11

Losing Timing

Views: 4,297

Posted By tweet

I took the icm to AZ and ran a check 5 times and...

I took the icm to AZ and ran a check 5 times and it pass every time,I was thinking it might be the pickup bad. I got the complete Dist for about the same $'s as a pickup would costand didnt have to...

Forum: 1st Generation S-series (1983-1994) Tech

06-12-2010, 02:55 PM

Replies: 11

Losing Timing

Views: 4,297

Posted By tweet

I ordered a new dist from skip white performance....

I ordered a new dist from skip white performance. While I had it out I put in a new knock sensor.Dont know which one fixed it but Blazer is a runnin again.Pop's

Forum: 1st Generation S-series (1983-1994) Tech

06-08-2010, 06:10 PM

Replies: 11

Losing Timing

Views: 4,297

Posted By tweet

It seems like the ECM is kicking out the EST...

It seems like the ECM is kicking out the EST completely.I pulled the connector off the ESC module did some checks,engine off swich on:
B= 12volts
C=.o2 volts
D=good ground
E=108.2 with meter set...

Forum: 1st Generation S-series (1983-1994) Tech

06-07-2010, 12:39 PM

Replies: 11

Losing Timing

Views: 4,297

Posted By tweet

Yes,I set base timing with EST wire in cab...

Yes,I set base timing with EST wire in cab disconnected. I took ICM out of distributor took it to A-Z had it tested (ran it 5 times) it checked good.I'll check ohms on pick-up. The only check I've...

Forum: 1st Generation S-series (1983-1994) Tech

06-07-2010, 09:57 AM

Replies: 11

Losing Timing

Views: 4,297

Posted By tweet

Yes I have set the base time at 0 degrees , the...

Yes I have set the base time at 0 degrees , the ECM then advances the timing about 12 degrees. This Distributor doesnt have vacuum advance.Thanks for the reply,Pop's

Forum: 1st Generation S-series (1983-1994) Tech

06-06-2010, 10:20 PM

Replies: 11

Losing Timing

Views: 4,297

Posted By tweet

No codes except when I run tests. Man,it a bugger...

No codes except when I run tests. Man,it a bugger when ya have a problem a no codes post!!!! I'm a thinkin maybe Dist pick-up? Pop's

Forum: 1st Generation S-series (1983-1994) Tech

06-06-2010, 02:01 PM

Replies: 11

Losing Timing

Views: 4,297

Posted By tweet

Losing Timing

Hi ,newbie to forum.1989 S10 Blazer 4.3L, code Z,
TBI, EST Dist.I thought I was fighting a fuel problem til I hooked up timing light. What happens is,,,Starts and idles,shows 12 degrees timing,if I...

Forum: 1st Generation S-series (1983-1994) Tech

06-06-2010, 01:36 PM

Replies: 4

Timing Issue

Views: 1,248

Posted By tweet

re: timing

I'm have the same problem but at just above idle and higher. Did ya ever find yer problem??? Pop's

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