WHAT CAUSES HESITATION WHILE DRIVING ALREADY HAD...

1990 Toyota Celica

Tiny

murphyt65

November, 28, 2012 AT 5:47 PM

What causes hesitation while driving, already had a tune up, timing belt. Etc!

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6 Answers

Tiny

autotech53

November, 28, 2012 AT 6:08 PM

FIRST BREAK DOWN TIMING BELT TO SEE IF MARKS ARE ON ONE TOOTH OF WILL DO THIS HAD SAME PROBLEM TWO MONTHS AGO. TIMING LIGHT MAY LOOK RIGHT BUT CAN'T SEE BEHIND THOSE TIMING COVERS.

Tiny

KHLow2008

November, 28, 2012 AT 6:11 PM

If the timing belt is out by one tooth, the timing light would show the wrong ignition timing. Distributor would be out of position.

When does the hesitation occur?
Is the Malfunction Indicator Light showing?
Was problem there before replacement of timing light?

Tiny

autotech53

November, 28, 2012 AT 6:19 PM

IF YOUR VALVE TIMING IS CORRECTED, CHECK FUEL PRESSURE, AND TPS SWITCH FOR VALUES.

Tiny

murphyt65

November, 28, 2012 AT 6:24 PM

While driving, hesitation starts from the time I start to drive and no indicator light comes on. Problem occurred after timing belt replaced!

Tiny

KHLow2008

November, 29, 2012 AT 3:04 PM

Seems the timing belt has not been installed correctly. You would need to recheck the markings.

Tiny

murphyt65

November, 30, 2012 AT 12:47 AM

Timing was tore down and checked out ok, and most everything else was checked, but the fuel pressure. Will get to that next week. Throttle or idle sensor was not working, but new one did not stop the hesitation problem. While driving home from shop, the hesitation seemed unnoticeable! One thing was not plugged in, that was corrected, but forgot what, get back to you on that, sorry! Thanks so much for all the expert advice. Will be clarified next friday.

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