car missfire when full throttle

[TD06_FD]

My car is FD runing single turbo.

Been driving 90-100mph for few minutes, suddently the car missfiring and poping from the exhaust when full throttle and wouldn\'t pass 2000 rpm, when light throttle it will go upto 4000 rpm the engine then missfiring and poping .  The engine seem fine start everytime and compression checked around 7.  Changed the spark plugs still no help.

My mechanic friend think is the control unit that control firing order or ignitior or resistor but he has no knowledge about RX7 is that such as thing on RX7?

Any suggestion??
thanks in advance.

[mx1311]

you say it starts fine? does it idle ok??? if it doesn\'t try the vac pipe to the boost sensor on the bulkhead!

[TD06_FD]

thanks mx1311:
I cleaned the boost sensor with electric cleaner, reset the ECU also.  Is VAC pipe= vacum pipe? I check also can\'t see any loose pipe.

[mx1311]

yes sorry vacum pipe!

give the pipe a wiggle see if its loose.

anyone else have any ideas???

[antnicuk]

is there still a vacume pipe on your FPR (fuel Pressure Regulator)?,  if not the fuel pressure will not rise with boost and can cause the same proplem,  its sounds like limp mode which i though you only get with a stock ECU, i assume as you have a single turbo you have and Apexi or similar.

[TD06_FD]

I checked the TPS throttle body sensor voltage, its out of the range measures 3.5V service manual shown 4.2v-4.5v, will buy one from dealer and try again hope they not too expensive.

[interloper393]

its a rx7 lol probly need the engine re-built hehe jus kidding
My last car did this, turned out it was running to rich and far to much petrol going in.. a few tweeks and she was fine, just had a rebuild tho o only cud take her to 3k

[rmagictastic]

I had this a couple of weeks ago.

first thing to check is that youve got plenty of bonding on the engine.

then remove the neg terminal on the battery and give it a good clean with some sand paper.

try that

Rmaj

[TD06_FD]

I just try plug in the brand new power FC and rev it everything seems fine but the heat lights flashing, anyone got a clue?

cheers

[rmagictastic]

red light flashing is high knock levels.
what levels are you seeing on the commander..

be carefull knock can be bad!!!

Rmaj

[antnicuk]

dont worry too much about the knock level unless you are on boost.

[TD06_FD]

I think some sensor faulty, in the sensor check menu
VMOP and HWL (top right) flashing not drive the car yet in case if I\'ll damage the engine.

What sensor are they?

[RE:Worx]

vmop  is metering oil pump will put stock ecu into limp home mode will put hwl (heat warning light) on pfc.

run premix till you get new metering oil pump fitted.

Geff

[TD06_FD]

Thanks Geff, any idea how much to repair metering oil pump? If its possible disable/remove it then run premix instead, I heard 500ml 2 stroke oil in every full tank is that right?

[maximtaylor]

yep, thats works out to around 100:1

Nice and easy to remember