Distributor timing (Page 1/1)
ViperRedFiero JUL 08, 10:17 PM
Hi I’m relatively new to dealing with distributors and need some help timing my 86 Fiero gt auto.

So basically I moved the distributor around until the car would run and then I marked the notch on the harmonic balancer and the 10 degree mark on the little timing bracket thing. Then I disabled the ecm and started the car and adjusted the distributor until the two marks were lined up.

The car runs good now but backfires when accelerating hard which it did not do even before I tried to set the distributor timing.

I’m not really sure what to do now so if anyone has any advice or tips on distributor timing I would appreciate it.

The car also backfires at idle when it’s warmed up. No clue if this is related or not
Patrick JUL 09, 03:31 AM

Read my post Here... and then ask any questions you might still have.
Vintage-Nut JUL 09, 08:06 AM
Or read the Georgia Fiero Club step-by-step "How to Set Ignition Timing on a V6 Fiero"
https://www.gafiero.org/tips/timing.shtml

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Original Owner of a Silver '88 GT
Under 'Production Refurbishment' @ 136k Miles

ViperRedFiero JUL 09, 11:47 PM
Hi I appreciate the help but I still have one question is the backfiring most likely related to the timing problem or is it a separate issue
1985 Fiero GT JUL 10, 01:49 AM

quote
Originally posted by ViperRedFiero:

Hi I appreciate the help but I still have one question is the backfiring most likely related to the timing problem or is it a separate issue



It could be related, it could be something different, once the timing is correct, you'll see if it's fixed or not, if not then there's more diagnosis.
Dennis LaGrua JUL 20, 09:51 PM

quote
Originally posted by 1985 Fiero GT:


It could be related, it could be something different, once the timing is correct, you'll see if it's fixed or not, if not then there's more diagnosis.



Did you use a timing light to set the timing at idle while the correct ALDL connector pins were jumped together? The slot on the harmonic balancer must appear to be at the 10* BTDC as on the scale..

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" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "