I Need Help

[ralpher]

i got a 91 mr2 its got A 93 JDM motor

its acting really funny.
it dont idol good and when u try to drive it it spudders untill the high rpms

any ideas??

[MR2Jedi]

I would check all ignition components-including spark plug wires and ignition timing..

[ralpher]

how do u check ignition timing?

[MR2Jedi]

Point your timing light at the crankshaft pulley.Adjust if needed by turning distributor.

[moogleX]

check your idle rpm's. replace your spark plugs, change the oil. make sure you are running 91 or higher octane petrol, check for boost leaks (make sure everything is secure and there is no air escaping out somewhere. your ecu might think X amount of air is going in and supplying X fuel, but Y air is going in and still X fuel making it sputter.)
umm... could be your ignition box, possibly even a ground somewhere so your not getting a good spark, maybe dirty injectors... list goes on.


any other info you could give us? is it still stock? anything changed?

[ralpher]

all its got is a air intake and berk exhaust
the engine light didnt come on
its got 94 octane gas in it

[ralpher]

it runs good after 1.5 rpm
befor 1.5 it has trouble to stay running like its not getting enough gas
.
i changed out the fuel pump to the walbro 255 and iv been running it for a week and it was working awesome

[ralpher]

now it wont even start
some one help me

[ralpher]

i installed it cuz i went from a 2.2 to the 3sgte
either the old one wasnt big enough or it didnt work at all but it needed a new one.
the fuel pump is still good

i think its the afm
i took off the black cap on the top and the 5th wire wasnt connected , looks like it broke off some how? it dont make sense cuz i was driving it when it happened and i never touched it befor

ill fix that then see how it runs

[Ghostyman]

Did you unscrew the connector on the AFM? That will break the connection.

Did you do the swap yourself? Was it running fine with the swap before?

[ralpher]

no i didnt do the swap my slef and it ran befor the swap and it ran fine after
it just started doing then when i was driving it
i check the afm and its good too.
its not pulling any codes

[MR2Jedi]

Yeah, you shouldn't open the works of the AFM...

[TheEngineer]

Well im thinking its either ingnition (spark plugs or wires) or it could be something as simple as a bad battery, alt, or battery terminal

[ralpher]

battery is good , its new . ill change the terminals in the morning

could it be the timing?

[MR2Jedi]

Have you checked ALL the ignition components yet?