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ZUKIWORLD Discussion Forum => Technical Discussion - Beginner / Repair => Topic started by: TX-Trak on May 04, 2010, 07:54:39 AM

Title: Motor Hesitation
Post by: TX-Trak on May 04, 2010, 07:54:39 AM

I have noticed that my newly acquired 95 16v tracker has some hesitation when when trying to accelerate.  This only seems to occur when i first start it and begin to drive.  after the engine has run for a while and is nice and hot, it does not occur.  Any thoughts?

Title: Re: Motor Hesitation
Post by: wildgoody on May 04, 2010, 07:19:32 PM

coolant or air temp sensors, my vote is for the coolant temp sensor

Wild

Title: Re: Motor Hesitation
Post by: Nick1236 on May 28, 2011, 08:08:41 AM

Bringing back the dead...

I get a similar problem on my 95 sidekick 16v. I get hesitation in the 2.5-3k rpm range or when the gas petal is about halfway. If i hammer on the gas and let it rev up higher (about 4-5k before shifting) it goes away some. I'll clean everything out later today with some throttle body cleaner. Any other suggestions?

Title: Re: Motor Hesitation
Post by: Foot on May 29, 2011, 08:16:41 PM

If it occurs at the same point of throttle it'spossibly a throttle position sensor. Also check for any vacuum leaks.

Title: Re: Motor Hesitation
Post by: mbruce on May 30, 2011, 02:28:58 PM

My 1.6L/8v does the same thing....

I changed the coolant temp sensor and no fix...

I could not locate the air temp sensor.... maybe it's MIA and that's my problem. ha

I'll check for vacuum leaks -- Just curious -- if it is a vacuum leak why would the issue only happen at startup and correct itself and run like a champ when it gets warmed up?

Title: Re: Motor Hesitation
Post by: Drone637 on May 30, 2011, 05:14:18 PM

Check your timing.  I run mine about 6 degrees of advance over the stock location.  Before that it had a hesitation around that RPM range.

Title: Re: Motor Hesitation
Post by: Foot on June 02, 2011, 07:05:01 AM

Quote from: mbruce on May 30, 2011, 02:28:58 PM

My 1.6L/8v does the same thing....

I changed the coolant temp sensor and no fix...

I could not locate the air temp sensor.... maybe it's MIA and that's my problem. ha

I'll check for vacuum leaks -- Just curious -- if it is a vacuum leak why would the issue only happen at startup and correct itself and run like a champ when it gets warmed up?

metals have a tendancy to expand when heated. the reason i said that was because i had a metal vacuum tube on the side of my plenum that was cracked and that joker took forever to find.

Title: Re: Motor Hesitation
Post by: Nick1236 on June 02, 2011, 01:41:33 PM

OK. I had a stalling issue when the car would come to a stop but only when at full operating temp, 180-195 deg F. I replaced plugs, wires, valve cover gasket (was bad), fuel filter, cleaned the MAF, cleaned the TB, cleaned the EGR (EGR main, havent done the tubes yet. Checked with a vacuum tool and it functions), cleaned the PCV valve and adjuested the TPS sensor to within specs. The stalling issue went away.

However, I'm still having hesitation in all ranges. Anyone have any other ideas?