gachg1187

I have a 1991 Rx7 convertable that runs fine but after it warms up and you start driving it down the road it starts jumping like the motors or somthing is cutting out. what to doo ppl help me out

marlaman

Sir, could you please be a little less specific?
Actually i'm joking, tell us exactly what goes on, what rpm's stuff like that man.
Matt

Andrew89GTU

i'm not sure EXACTLY what you're talking about.... but my '90 turbovert does that too.... maybe it has something to do with the fact that it used to be an automatic n/a, then got full TII swap, then blew TII engine, so the n/a and n/a auto ECU was put back on.... but it idles maybe 1100 RPMS, and that is as low as it will go. but when i turn on lights, A/C, etc.... it drops the RMS and the ECU kicks it back up at 1k.... so it basically idles like ****.

anybody know what's going on ??

(not meaning to hijack your thread, btw, just wondering while we're on the subject of shitty idling verts :-D)

-Andrew-

Icemark

You have not provided enough information to help... describe your problem more in depth

gachg1187

well it idles around 1500 rpm after warm up and it starts jumping around 3000rpm is there anything else i need to know?? i had a guy look at it from the place i got it and he seems to think the timing it slipping ..... so i figured i would ask you guys bc you seem to know what you are talking about

Icemark

So the idle is not consistent??? This is your jumping problem??? That the idle surges between 1500 and 3000???

If that is the case it is probably a bad BAC or an AWS solenoid installed backwards.

To make a car jump you need to head down to the barrio and have hydraulics installed.

gachg1187

no it has a steady idle of 1500 rpm and when driving the car when you get up to about 3000 rpm the car starts jumping as if the engine is cutting out or somthing

Icemark

Okay first off the idle should be at 700, not 1500. If your idle is at 1500 then there is a serious problem right there.

So then you are loosing power at 3000??? or it is surging to high RPMs??? or ???

See you have posted three times, and we still don't have enough info. Write a book if you have to... but you need to say what really is happening.

You need to put in as much detail as you can for anyone to help you.

gachg1187

ok well lets see while driving the car it does fine until you hit 3000 rpm when you hit 3000 rpm the engine surges up to about 3500 then back to 3000 over and over until you let off of the gas then it runs fine ..............it kinda like when you hit a rev limiter i guess is the way you put it

gachg1187

is that anymore help bc i really dont know what else to tell you bc that what its doing and i am new to the rx7 and the whole rotary motor thing

WAYNE88N/A

Check your TPS (search will yield more than enough info to accomplish this), then write your book for us...

HAILERS

Tell you what. Try to disconnect your tps and then go for a drive and see if you have the same symptoms. Write back. The TPS connector is but inches from the TPS.

gachg1187

ok ill do that but right now i have a local rotary shop looking at it so ill see what they say and then if they dont know ill try that .........thanks for all yall help ill let you know what they say

gigabot

I had the exact same problem and it turned out my OMP was bad and the ECU was in limp home mode. Are you getting a check engine light?

gachg1187

yes i am and the mechanic said somthing about they couldnt get any computer codes off of it