Acceleration problems
 

hi!
i have a problem i really need to get some help for...its not only att acceleration but about 90% and far more severe while acc. bought the car about 2month ago and
drove it for a month without a problem then this just happen one day.(after buying SAFC,FBC,timer,exust and more, so money isnt a good thing right now hehe.
i have no problem reving i N , but as a press the pedal i jerks as i it dont get any fuel.
first it were only above 4000 so i thought sec. injectors but last time i drove it began att 2500 so i guess thats not the case.
only mod is open filter but i have a stash of thingts to put in as soon this is fixed :) so PLEASE.... i really need help.

have looked around the forum and found about 20 things :( and it all just spinns around in my head right now.... dont have the money to change every part of the motor :(

plez also link to any write-ups you have for things to check (pulling codes,tps+dashpot cleaning ect.)
perhaps you know of a better one than i found.

best regards from sweden! /crille

RX7 vert -89

if you need more info just lett me know and ill try to explain it for you.....

Most problems in the area would give a check code.

I would check the TPS - not the idle setting, but the resistance values as the plunger moves in and out.

Pull the TPS connector off.
Get an analog (needle type) VOM set to the 1K ohms scale.
Connect it to the pins for the orange & black wires.
Open the throttle enough so you can test the TPS plunger through its full stroke.
As you work the TPS plunger in & out, the meter needle must swing smoothly from ~0 to ~5K ohms.

As the TPS wears, it can give non-linear or inconsistent signals to the ECU.
A worn out TPS may give 1K ohms at idle, but have a drop out further up the scale.
A drop out at mid scale will tell the ECU to idle at that point & give a fuel cut hesitation.

If the meter shows a jerky or uneven sweep, spray contact cleaner may fix it temporarily.

Also check for vac leaks.

Are you getting a "check engine" light?
See if it gives you any codes (i.e. 20, 17).

thanks for the answers,


the "check" contact is the green one by the front igniter right? witch pin should i ground there? as i have understood it i just ground that and turn the ignition and it should flash in the clock panel right?
sorry im totaly new to this, havent ever toutch a motor exept changing oil :) but with this car i dont trust the mechanics around here :(

have the haynes so ill try out the tps , have som wierd idle to and that should be the tps som it wont be a bad thing anyhow.

Here is a good description:
http://www.1300cc.com/howto/how2/codes.html

i have a black singel she contact right beside a green lager contact...could it be that one?? (looked att the picture on 1300cc and there were a small green contact beside the larger green and i dont have the small green!