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Old 02-03-2000, 05:56 PM
Mark Sare
Posts: n/a
My car occasionly tugs when I accelerate. Or in more detailed words its rate of acceleration increases and decreases through the whole process. It follows no particular pattern. It may accelerate at one rate for half a second and then at a higher rate for 1 second and so on. This problem first started when I changed my fuel injectors and has gotten worse. I also need a new fuel distributer because my 7th cylinder isn't firing at idle(due to too much gas), but this was the case before this "tugging" started. The compression is good, I had that checked and I've changed the air filter and fuel filter to no avail. Maybe it's the fuel pump. I'd appreciate any help.
thank you

[This message has been edited by Mark Sare (edited 02-03-2000).]
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Old 02-03-2000, 08:03 PM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
Why were the injectors replaced?? What year car is it? The fuel pump can be tested for pressure & delivery. Has the ignition system been tested for coil output?
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Old 02-03-2000, 09:10 PM
Mark Sare
Posts: n/a
Thanks for replying. I replaced the injectors because I figured they were clogged. Unfortunatly the fuel distributer is probably the culprit. I think the 7th cylinder works at higher RPMs though, because the car is driveable. But the "tugging" problem only started after I changed the injectors. Maybe it's a coincedence.
Coil output is related to the distributer cap, right? Well, I changed that and all of the sparks are getting sufficient voltage.

PS the car is 1978

[This message has been edited by Mark Sare (edited 02-03-2000).]
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Old 02-03-2000, 09:12 PM
Join Date: Jan 2000
Location: Indpls.,IN. USA
Posts: 84
It sounds to me that you are experiencing ignition miss. This could be created from a wide variety of problems. The 350 motors often had oil consumption problems that led to plug fouling. The first thing I would suggest is that you have the ignition scope tested. If you are approaching this as a do-it yourself situation I would read your spark plugs. They should be an even toast brown with very little buildup of ash or soot. If these look reasonable then I would try misting your ignition wires, cap and coil with a spray bottle filled with water. This would be best viewed in the dark, of course the engine must be running.I hope this helps and heads you in the right direction.
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Old 02-03-2000, 09:22 PM
Mark Sare
Posts: n/a

So if the spark plugs are good then I should spray a mist of water on the ignition system stuff. What does this test? And if they are all sooty I'm in trouble, huh?


[This message has been edited by Mark Sare (edited 02-03-2000).]
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