Hesitation than cleared itself
 

Like the title says hesitate than clear..

Have not driven my Z since Carlisle..Took it out this morning....Car ran fine for first five -six minutes.....Upon acceleration it began to hesitate than it would clear itself.....Did it about five or six times....Had car out for about 25 minutes...

Idle would also drop at times when I was stopped....Car is ported and cammed 91...

Accel injectors..Swapped out fuel filter about 7,000 miles ago....

Thought maybe its bad gas but I filled up the w end of carlisle....Car runs great up until this morning...

Thoughts?

Re: Hesitation than cleared itself
 

Are you referring to hard acceleration (secondaries opening) or just mild acceleration in traffic?

Do you have access to a Tech 1 or similar scanner?


Jim

Re: Hesitation than cleared itself
 

Hey Jim..

Secondaries deleted..I would say normal acceleration....Roughness at idle at times as well...

Re: Hesitation than cleared itself
 

Definitely sounds like a fueling issue. Did it stop after it was completely warmed up? Can you check fuel pressure upon acceleration? Are you still running with the original fuel pumps?

How long since Carlisle (I should know this)?

Steve

Sent from my XT1585 using ZR-1 Net Registry mobile app

Re: Hesitation than cleared itself
 

Hey Jim...

It performed the way its supposed to when it got fully warmed up....That's my next step, check the fuel pressure..Don't know if they are original fuel pumps...

Will take it to my mechanic maybe Saturday morning....Before this morning, last time I used car was the Sunday of carlisle weekend..

Re: Hesitation than cleared itself
 

Hmm, you might also pull your plugs and check them over.. pictures of them would be good as well..

Steve

Sent from my XT1585 using ZR-1 Net Registry mobile app

Re: Hesitation than cleared itself
 

Are you saying the issue was with “the warmup routine” as opposed to normal operation?

Re: Hesitation than cleared itself
 

Even if its not fully warmed up it should not have done this.....The last few mins of my drive it seemed to have gone away until I was backing into my garage I felt the idle start getting rough again...

Will see if my mechanic is in a " good mood " Saturday morning.....Will check for fueling issue..

Re: Hesitation than cleared itself
 

Trying to understand what conditions were different today from Carlisle, ie temperature, weather?

Re: Hesitation than cleared itself
 

Well it was cooler today.than Carlisle at least 25 degrees...Great driving weather though..Good air no humidity..