big tex

When I sit at a stop light, I can feel a gentle bump or knock or something. I am not really sure of what it is. Ignition? thanks, big tex

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1992 305 TBI RS
Flowmasters...basicly stock with interests to modify

Josh 91RS

Might be dirty injectors. I have a 91 305 tbi. I had the same problem, put some gumout octane booster/fuel injector cleaner in my gas tank...10 minutes later had a cleaner idle and the car accelerated much much better, with a lot more sound to it too. Shouldve cleaned the injectors right when i bought the car

big tex

thanks josh...i'll try it

Josh 91RS

Could also be a miss, but hey, for the $2 a bottle of injector cleaner costs its worth it to try...especially since they probably need it anyways.

Ski89Z28

You may just want to check th compression in each cylinder if the injector cleaner doesn't work.
Then you may want to replace the ignition control module in the distributor if the compression is good and the module has never been changed and you have over 50,000 miles on it. That is just good maintance.
Good Luck!

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89 IROC 350 Auto
Custom DUAL Exhaust
Edelbrock Performer 6085 Aluminum Heads
ZZ9 Cam
TPIS Level 5 Chip
14.01 @ 97.0mph with 2.77's gears and a bad ignition control module!
And Free mods.