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?

85

Asked by 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 out of 2 people think this is 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.

Can someone help fix this problem let me know what the problem with that

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