im getting some hesitation/stuttering at low rpms when i hit the gas, it smoothes out after the rpms go up a little, around 2k or so. tps is set perfectly, i sprayed some starter fluid around my manifolds and vac lines, but no response. plugs are like new, less than 100 miles on them, and the plug wires are new too. need some input asap. theres a plug unhooked going to a small black box that is bolted to my clutch slave cylinder, im not sure what that is.

HELP

 

bah! need help now! please!

 

i know someone else has had to have had this problem

 

Don't worry, this is a common problem below 2k rpm in first and second gear. The field service manual addresses this problem thoroughly and, as I remember, it is a matter of adjusting a couple of components on the N/As. Unfortunately I haven't got the information available now. If you do a forum search on engine bucking you should find some help. Try this [URL=https://www.rx7club.com/forum/showthread.php?s=&threadid=154035&highlight=engine +bucking]

There are several discussions there on your problem.

 

its not a bucking problem, it just hesitates, sort of like when you get detonation, but its not det. its just feels like a misfire or something until 2-3k

 

checked/ cleaned grounds? the black "box", as you call it, is the capacitor (FSM calls it a condenser) for the oil pressure sensor circuit, reduces electrical "noise" from the ignition system...your oil pressure gage doin O.K.?

 

lol, no, actually my oil gauge is broken. theres no plug on my engine harness for it.

 

don't need the cap hooked up then
how about those grounds, specifically top of engine under the intake?

 

omg, I am having the same problem, and on top of that, my damn car won't idle.....PLEASE HELP US!!!!!!

 

there won't be, but there is aplug on the driverside harness wrap. Its a clusterfack, but just look for a yellow/red stripe wire on the driverside near the oil filter mount. The oil pressure system has that capacitor wired in parrallel, so there will be *two* yellow/red wires...

Mine was broke off at the wrap tape, and I had to search for about 45 minutes with a sharp razor cutting that tape to get to the wire. Sitting under there is so much easier when you don't have the tranny up, lol...

 

ive triple checked the grounds. i lightly sanded the contact surfaces, sprayed this corrosion inhibiter that decreases resistence, and bolted them down tight. im taking off the turbo to check everything and putting a new lim gasket on. also replaced the tps with a spare one i had, which did nothing, and am getting another fuel rail to check the FPR. ill let you know if it works

 

most corrosion inhibiters are applied AFTER the terminal is grounded- make sure that stuff says it can be applied between the terminal & ground if that's the way you're using it...why did you have to triple check? once should have done it

 

well, ive checked them several times since ive started having this problem, just to be sure i had them right.

 

I have the same problem but my TPS is messed up I tink!
I tightened the screw all the way and it messed up the idle but after driving it around the block the idle fixed itself. My rebuild only has 1200 miles and its idling around 1500rpms, anytime it gets close to the 750 mark it shakes and almost stalls

 

87rx7tII, sounds like your timing is off, mine did that after i took my front cover off and had to restab my CAS.

 

but the only reason the idle is messing up is because I messed with my TPS. The highest reading I was getting was .777k at WOT when its supposed to be at 1K at idle. I think I might go out and pick up a new TPS

 

im having a problem just recently with my 88 NA, Starts up and idle's to 3k as it would normaly and it runs fine until it gets to the actual idle speed around 750 then the engine starts to shake and stutter like crazy and my rev guage bounces between 750 and i say around 600-575, it wont die out so i guess im lucky there, it drives fine as long as its going past 750 revs it works perfectly but when it gets down there it always does it, this started happening last week. my first thoughts is that there could be an airleak somewhere. any thoughts? suggestions? i was also thinking that could it be caused by having the belts loose? like around the air compressor persay? i checked the tension and my belts are a bit somewhat loose but i dont have the time to actualy tighten them between school and full time job. so if someone can please give me some recomendations on what i should have it checked out for thnx.