hi guys can you help me iv just replaced my maf sensor and my car started straight away with no hesitation went to work in it and it was fine i went to start it up this morning and my car struggled to fire straight up it takes 2 to 3 goes then she starts up i had the problem before thats why i changed the maf sensor iv disconnected the sensor while the car was running and it made no difference it still ran same as it did with my old sensor in can someone advise me wot it could be its doin my head in

 

Disconnecting the sensor while running is a test for nothing and CAN have serious repercussions on the engine, so don't do it.

We need to know what car, what model, what year.

I ASSUME you are keeping your foot well clear of the throttle while attempting to start it?
If not, you'll flood it.

Have you checked for stored codes?

 

hi sry my cars a 99 v reg m8 gc8 iv not actually looked for any codes but iv got no engine managament lights on or anything it feels like its boosting fine no loss of power that i can feel anyway iv only been a scooby owner for a few months so dont no lot about them and yes i never use the eccelerator when starting when i changed the sensor she fired straight up like when the chokes on then goes to normal like all cars when they start to warm up but this morning it took me 2 to 3 goes then she fired up but seemed to struggle for it to get on choke she idles fine tho and the maf sensor is a genuin subaru one aswell m8 thanks

 

by the way m8 it only does it from cold start aswell other to that shes fine

 

Jeez mate, can you put some punctution in, your posts are soooo hard to read and make sense of. You'll get better replies too.

OK, are you sure the fuel pump, is priming? When you switch on from cold, do you HEAR it, over your right shoulder? It should buzz for 2-6 seconds, then stop.

If it's priming, do you have a spark ? You'll need a plug out to check, driver's side are easier.

 

sorry mate yes my fuel pump is priming i can here it over my shoulder, iv recently had it serviced new plugs oils everything really, again tho when i changed the sensor from the faulty one,it started straight away without any problems thats when i thought id cured the problem

 

OK.....we've not touched on this yet, so what mods do you have, if any?
And list ALL engine mods whatever, they can all cause their own problems. MAf's are one of them, especially on that MY.

 

Hi iv just got a blitz nurspec induction kit and iv just put a new vortex afterburner back box on m8

 

Eeeeh....induction kit


NOT with that MY unless running MAf-less. You could well have killed the new MAF if it was that in the first place.

Those MAf's dopn't like the vibration and the oil that comes off the filters.

 

Thanks m8 Im going to get myself a proper air box and a panel filter then go back to standard where can I locate a second hand air box from though will eBay have them and wot do you recommend m8

 

Hi m8 thanks for your advise I'll be findin myself a proper air box from somewhere now, going to try those green panel filters I think what would you recommend? Thanks again anyway mate I no your right about it so I'm just going to get myself a proper box and try again just hope I can get hold of another maf