lately my 86 monte carlo has a weird rattle noise when idle but as i step on gas the sound goes away not sure if it comin from under or something w engine ..could it be my cat convertor?

185

Asked by Sonia Jun 22, 2011 at 11:13 PM about the 1986 Chevrolet Monte Carlo

Question type: Maintenance & Repair

3 Answers

has it lost any power,if not not the cat converter,valves may need readjusting.or it could just be the crap gas we get now.

2 people found this helpful.

My 86 Chevy Monte Carlo L s does the rattling while driving at thirty five miles in hour, I have to hit the gas in order for it to go away. But when I slow down and the transmission kicks down to second my car jerks and the rattle get loud until it's picks up speed.

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