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Dave Nova
Dave Nova, Buick Technician
Category: Buick
Satisfied Customers: 1808
Experience:  ASE Master Certification. GM World Class Certification
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I have a 1991 5.0 buick roadmaster estate wagon, I have a

Customer Question

I have a 1991 5.0 buick roadmaster estate wagon, I have a intermittent miss after the engine is at operating temperature in high gear at hiway cruising speed in which the tachometer flutters 2-3 hundred rpm along with the miss. I have replaced the distributor due to a no start problem, and hoped this would have resolved the issue it has not.
Submitted: 8 months ago.
Category: Buick
Expert:  Roy Belding replied 8 months ago.

good afternoon my name is ***** ***** I will assist

have you changed the plugs and wires???

Roy

Customer: replied 8 months ago.
no it looks as though they have been changed in the last 20k miles not getting any spark grounding from plug wires it does have just standard copper plugs it appears I have had the vehicle for a couple months and going off previous recipts. since no codes are being set you thinking under load this is possibly a bad plug or wire??
Expert:  Roy Belding replied 8 months ago.

that would be hard to tell especially when they break down when hot.

I would at least remove one and inspect the gap and see if it is excessively worn

Roy

Customer: replied 8 months ago.
I did when I pulled number 1 to set the dist, looked pretty good but like I said just a standard plug so since its getting a mixed tach signal you think all on electrical and not on the tbi at all
Expert:  Roy Belding replied 8 months ago.

I would start there. I always start with basics.

Roy