Mazdagurl84

Hi guys,
So I bought a 91 2nd gen, n/a. got it for a good price, ok... so here is my problem the car start just fine and idles great, but when you start to drive it if you feather the pedal it'll seem to work ok, but when you push all the way, or even a little farther then it sweet spot from where it seem to run ok.

i have check and clean all the ground that has been highlighted in the forums. now i'm looking for more ideas what to check since i would like to drive my new baby


any help is much appreciated

Thanks
Christal

misterstyx69

iTrader: (142)

RX7 FD and Series 5 Error Codes

Mazdagurl84

Ran the car, code came up shut off the car did the ground-green wire turn car back on didn't show any codes but after looking on forums I think it might be the map or maf sensor.

Now I have to figure out how to test them :-/

Anyone that could help with that I would forever be greatful 💜

Thanks
Christal

satch

iTrader: (1)

Whice code and which Green wire?

Mazdagurl84

It was the single green wire by the battery, the engine light will go on with the key turn off wait a second then come on steady

Mazdagurl84

Update: i found out that there was a leak in the fuel line coming from that vacle thing to the fuel rail. Is it a possibility that's my problem? I'm still waiting for the intake gaskets, so I won't know till I get them :-/

Thanks
Christal

evo_koa

iTrader: (2)

a fuel leak can cause a stumbling problem, be careful driving with a fuel leak it could be catastrophic

misterstyx69

iTrader: (142)

Sounds like the Pulsation dampener which is a MAJOR cause of engine fires on these engines.
IF you care for your car enough,do NOT start or run the car Until you get this fuel leak fixed.
Or have the Fire Dept on Speed-dial.

Mazdagurl84

Ok update more
Fixed fuel lines got a known maf and to cover bases map, still dose the same thing.

I did however got some codes maybe they can help someone point me towards the right direction

They are:
8 Air Flow Meter (AFM) Open or Short Circuit
10 Intake Air Thermosensor (AFM) Open or Short Circuit
13 Pressure Sensor (Intake Manifold Pressure)
18 Throttle Sensor (Narrow Range) Open or Short
27 Oil Metering Pump Open or Short Circuit OR Stuck MOP Sensor,
30 3 Long Solenoid Valve (Split Air Bypass) Open or Short Circuit
37 Oil Metering Pump Low Battery Voltage, Malfunctioning MOP or ECU, Step Motors, Open or Short

Thanks
Christal

rotarr

iTrader: (4)

The car is in ( limp mode ) New ECU and new MOP seems with all those codes that the ECU is fried sorry for the bad news hope some one could jump in and confirm,had a friend had the same problem and that what it was.

Mazdagurl84

Ok, replaced ecu, omp, vaf, map, all fuel line, what do I have left? Oh!! The tps, tested it idle it was 1539 ohms, wide open throttle OL, where the throttle works at it seems to read past that no continuity. Hmm... So I bought one off eBay, we'll see if that will work when it gets here :-/

Just an update

-Christal

sir revalot

Keep it simple first... Checked fuel pressure?
Put new plugs in?
Got good spark at the leads?

Oh and check you have good voltage at the key whilst running with heater and lights on....

misterstyx69

iTrader: (142)

If you replaced the ECU,then what codes are showing up on the car now?