Fuel Pump or coils Dying??

[agent]

Whats the symptoms of a fuel pump crapping out??

Ever since I bought my BG5 its been quite hesitant when you put your foot down from low revs, almost bunny hopping. And also at high boost the car is hesitant and on 2 occasions while passing on the open road it has completely cut ignition in 3rd gear at around 100km/h. I'm pretty sure its not the coils or plugs, as I have recently replaced the spark plugs, and the coils looked quite new, is there any way to test them??

Thanks in advance for any advice.

[dubbedup]

every F.Pump i have had has just died, not worn out so to speak, unsure on coils possibly have to get them load tested?

[Swindog]

get a fuel pressure test. both arent something you want crapping out

[agent]

Cars off the road for a bit now, so will have to look into it further.

[Swindog]

Got any mechanic mates? They should have a pressure tester for you fuel.

[Guest]

can test colis

As for cut out - sounds more like boostcut !

[Guest jakesternz]

 agent said:

Cars off the road for a bit now, so will have to look into it further.

hey agent,

i did the bunny hope thing down road today at 2k revs. first time car has done it. Did u get yours sorted?

[Guest]

have u tryed another air flow meter mine was doing just what u described and it had me baffeled so took it into speedtec in the hutt and it was that. apparantly subarus dont like pod filters!!! it stuffes the meters up and i have never had the same problem again.

[PhatRS]

 Ichi Ban said:

can test colis

As for cut out - sounds more like boostcut !

Out of interest Rick, how do you test the coils? Properly that is I may have a slightly dodgy one that created a miss during the tune at 6500rpm and would rather relace the faulty one than all 4 if I can help it.

Back on topic, I had a very similar thing happen when my alternator died but it cut out a few times, bunny hopped like that and then stopped not long after.

[agent]

still having the problem, Ive not really had the time to work on it. I have recently changed AFM but I might switch back to the old one because it htink it has got worse.

A bit of of info on testing coils would be mint too, surely they have some sort of resistance value they need to be close to or something.

Cheer

[Guest jakesternz]

took car in to mechanic to check for fault codes.

AFM showed up (must have been the bunny hops yesterday)

Replacing with a Genuine from Subaru, $226

Will update if any better tomorrow!

Here's hoping

[Guest]

 PhatRS']

[quote name='Ichi Ban said:

can test colis

As for cut out - sounds more like boostcut !

/quote]

Out of interest Rick, how do you test the coils? Properly that is I may have a slightly dodgy one that created a miss during the tune at 6500rpm and would rather relace the faulty one than all 4 if I can help it.

Back on topic, I had a very similar thing happen when my alternator died but it cut out a few times, bunny hopped like that and then stopped not long after.

Dyno run coils on test bench, to check output

usually at 8000rpm

and high boost setting for gap

Also check insulation of coil during this test

[Guest boostin]

Note this is quite aggressive and drives the coils hard. Its a good test of them though.

[Guest jakesternz]

 jakesternz said:

took car in to mechanic to check for fault codes.

AFM showed up (must have been the bunny hops yesterday)

Replacing with a Genuine from Subaru, $226

Will update if any better tomorrow!

Here's hoping

Woohoo!! Have solved the horrible engine issues with the new Air Flow Meter. The dude at Winger even gave me a discount. Merry Christmas (wish he had told me about the funny screw driver i needed to remove it though).

My beast is running like new again... well, for now anyways.