I know there has been many threads on this issue of 35 thousand rpm hesitation but this is the problem i have fo0llowed all the advice i have seen on those threads i have even asked a few of you guys for help this is what has been done to my 86 fc, i have replaced plugs (KGN) and wires, all 4 injectors, the air flow meater, the fuel pressure regulator, the fuel pump, put a K&N ram air filter on it, pulled the dash completely out and checked all grounds and the wireing harness, pulled the egi fuse and pulled the readiator cap to look for bubbles (none) have done a complete tuneup just short of completely rebuilding the engine i have put in a new cluch replaced the oil presure sending unit, and all of the catalytic converters. im at a loss. if i start it first thing in the morning it seems to act fine then after it gets up to operating temp is when it starts heasitating and at 60 to 70 mph it will start bucking. and heasitating even worse on ocation it will die when i come to a stop i need help there is somethin im missing and i dont know what it is later i will post the pics of the dash pulled out and replaced,
PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! i apreciate your time and help thank you
seto kaiba

 

Did you check the grounds for the boost/pressure sensor?

What about the TPS? Is it adjusted and within spec?

 

boost syncer seems to bee ok no problems where is the tps located and how do i check it i apologise i am still new to the charicter flaws of the rx-7 this is the 4th one i have owned and this is the first time i have ever had a problem like this

 

Factory service manual is available for download in the FAQ.

 

I have the same problem right now. my car start up fine but then after the motor get warm up the hesitation start to happen at about 3000 rpm or when i floor the gas pedal to the ground. I was told to redo the ground from the ecu to the block with a 4 guage wire. And that didnt work, I aslo check the tps but that works fine. Tps is a switch, like an on and off switch so if you tps wasn't working you would notice right alway. I havent check the boost sensor ground but i'm pretty sure it works.

Do you have a fcd?

 

i dont know what an fcd is to be honest still new to alot of this

 

fcd is only for turbo 2 I though you had an t2. but we still have the same problem.

 

your tps can give you many headaches!!! trust me i know what its like.

 

well guys this is how it all come out in the end as you well know on thanksgiving i was pulling the dash out of my fc while most of you were just cuting the turkey, to try and find out why i was having hesitation problems around 35 thousand rpm and couldnt get it past 65 to 70 mph, well after many hair pulling hours and alot of you guys helping me out which was much apreciated i got fed up with it and put it all back together spent time with my family and just put it all in the back of my mind . well as time grew short it come time to leave me and my girl got in to the car to start our 1200 mile jurney from kansas to virginia well surprisingly enough i startede the car with no problems hell seemed to have a new life about her didnt know what to think just shook my head said my goodbys to family and friends and headed out well me and my girl was actualy realy suprised how the car was running well we no more commented on that and the problems started all over again i delt with them for a few miles biteing my toung not to curse and hit the stering wheel so i pulled off to a gas station to fill up then some thin eccoed in the back of my head check to boost syncer again i do beleave one of you sugjested this to me a few days earlyer and i thank you becaue i reched out and unpluged that bitch and it went to acting just as it should all hesitation and problems were gon it was as it god him self healed it we god back in the car and drove all the way to va with no problems the next day it acted up again i pluged the boost syncer back in and it has been fine no problems as of yet , now im just lookin to replace the boost syncer once im able to find some one who has a new or rebuilt one for sail , again every body thank you sooo much for your time and help .

 

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