what is causing the ticking?

25

Asked by Mar 01, 2008 at 12:15 PM about the 1995 Chevrolet Tahoe 4 Dr LT 4WD SUV

Question type: Maintenance & Repair

it only happens when i accelrate. as the rpms go up the ticking seems to follow it. i can hear it clear as day in the cabin of the truck. not sure if it can be heard on the outside.

2 Answers

6,915

You have "pre-injition" Basicly a carbon build up. You need to start using the next grade in fuel. You might want to go in for a "injector service". As cars age this happens. After the injector service I would recommend that you change your plugs. And this will cure the "ticking". If that is not the problem, You could have a exhaust manifold leak, that is common. You might need new bolts. Or if that dont work, You could also have a bad spark plug wire. All these will cause "ticking" upon acceleration. I would recommend that you get it looked at, the mechanic will be able to direct you on which issue it is. Best of luck.

1 of 1 people found this helpful.
43,535

In addition to all of these things, you may want to look at the valves. The rocker arms can loosen up and allow a bit of freeplay which will lightly "tick" as rpms increase. I removed the valve cover on a 1992 Jeep Cherokee and ran the engine as I tightened each valve slightly until the ticking stopped to fix a prob. just like this.

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