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Topic: Figured I'd move this over here (bad hesitation) (Read 4763 times) previous topic - next topic

Re: Figured I'd move this over here (bad hesitation)

Reply #15 –
Well........

I got fed up and said "I'll leave it to the pros" and made the mistake of dropping it off at a local dealership yesterday morning.  I told them about the AC problem, and the problem with the hesitation and rough idle.  Today, I finally get a call.  The guy tells me "Well we sent it to our drivability department and we are thinking its your motor mounts." ........  motor mounts?  ...  :wtf:

Is it just me, or is that the equivalent of an ASE tech telling you that you have to have your radio on to put the car in reverse.  OK I can understand maybe it doesn't help avoid vibrations, but come on, its not gonna cause the car to dip erratically in idle and run like  is it?  I'm no expert, but I call  :bs:    For as long as I've had the car, no mechanic has told me it needed new motor mounts, and I don't recall the engine ever vibrating badly.

Well now I have to wait for them to send it off to the A/C department and HOPEFULLY fix that without telling me its my seatbuckle broken or anteanna stuck.  $65 diagnostic fee per problem...just to tell me its the motor mounts and possibly transmission mount...
Fly on Thunderbird, Fly! Operation Buy Back My Tbird or one like it funding: $0

Re: Figured I'd move this over here (bad hesitation)

Reply #16 –
Wow, that's shafty dude. I would be P.O.'d too. Motor mounts don't make the car hesitate and stumble.

And I lied...the problem did not go away completely. It's better but still there. I am going to swap out another upper intake and throttle body to see if that does anything. Sounds strange but that actually did help on my old '88 XR7. If the problem exists after that...then I have no frickin' clue what it could be. I'm starting to lean toward the O2 sensors more, even though everything is telling me it's emissions related. I will also snag some TAB/TAD parts at the boneyard next week and try swapping those in. What a pain.

Re: Figured I'd move this over here (bad hesitation)

Reply #17 –
The unsolvable problem strikes again!!  haha.  Geez its not supposed to be this hard.  :giggle:  One of my shop manuals said that it could be caused by worn cam lobes?  By the time this is done we may have completley restored cars! 

I just want to pay the 65 bucks ( x's 2 cause I listed 2 problems  :mad: ) and get my car back.  Remind me never to go to a dealership again for car problems.
Fly on Thunderbird, Fly! Operation Buy Back My Tbird or one like it funding: $0

Re: Figured I'd move this over here (bad hesitation)

Reply #18 –
you know matt, i was just remembering something.  A few years ago in va beach, a ford tech installed a "delay valve" which was placed in line with my egr to cure hesitation.
i still have this valve but its up with my spare parts.  Its a "rated" valve sort of, kind of a timing thing where the egr lights off too early or too late and things like delay happen.

hummm  , maybe you could read up on egr troublehooting tips.  Thunderchicken sent me a world of info on em and they seem pretty logical when you stew on it for a while.
got a fax?

Re: Figured I'd move this over here (bad hesitation)

Reply #19 –
Quote from: jcassity
i spent several years chasing that problem.  Its now history but it is a DIY job if you feel comfortable pulling the injectors and replace the tiny screens in the top of each one.  I just left mine out and added an extra fuel filter in line with my throttle body.

Can you clean/replace those screens? My '85 Cougar hesitates a good bit. Everything I've tried hasn't eliminated it.

Re: Figured I'd move this over here (bad hesitation)

Reply #20 –
Quote from: JeremyB
Can you clean/replace those screens? My '85 Cougar hesitates a good bit. Everything I've tried hasn't eliminated it.


if you can find em,, yeah.  I dont have any ,, just tossed my old ones.
i installed a secondary filter up in the engine bay inline with my fuel feed line.

Update

Reply #21 –
I replaced my injectors with some from Advance ($100) and it cured my hesitation problem. My hesitation symptoms were not that of the thread starter though . My car hesitated anytime you hit the gas, off idle was the worse. I believe it was due to contamination from leaving the inlet/outlet to the CFI open to the environment for a week (long story). That contamination also caused the check valve on my FP regulator to fail. After replacing the injectors, the car feels like it has 2 more cylinders. I got worried when I took the old injectors out and the screens looked clean, but the proof is in the pudding.