weird WRX problem dieing at operating temp

[tydon]

my mates v2 wrx ra is having a weird issue itl start up fine and idle from cold but when it gets to operating temp itl die.

and wont start properly doesnt throw any check engine codes either.any ideas?

[loganrasti]

Afm maybe? Or water temp sensor possibly? Someone will confirm

[tydon]

it had a recent headgasket replacement aswell if that helps. wanting to know im looking at inheriting this problem with cash to fix it lol mayb.

[tydon]

wondering if itd be easier to just replace the whole motor than try diagnose the problem

[tydon]

so after some heavy research i have come up with a list of possible casues.

CamShaft position sensor.

Crank Shaft position sensor

Temp Coolant sensor

AFM

Fuel Pump

Fuel Pressure Regulator

Injectors.

LOL sounds like a headache.

anyone got any ideas?

[Roo]

I\'d believe either of the 1st 4 on the list but the rest wouldn\'t give you this issue.

Have you checked for codes?

Or take it to a garage/sparky and get them to scan it, can see all current data for the sensors and see if everythings in check.

[tydon]

im going to go view it today at lunch and try check for fault codes. hopefully its an wasy fix cause i really want it haha.

and dont really wanna buy a new motor for it.

u think mayb a stuffed replacement head gasket would casue the problem?

[X]

it could be the fuel pump i had this same problem before

[tydon]

so i replaced the crank and cam angle sensors with no difference it idle at running temp. but noiticed the revs were quite low. also when it 1st started it idled around 1200 and wouldnt move. i think it has multiple problems sounds like its running on 3 cyls. AFMS been replaced.

it has a vf22 that is horey\'d up to run on the v2 setup lol.

[G-unit]

do these have a idle control valve that can be cleaned? mine would stall when at operating temp, cleaned that and mint

[boon]

 tydon said:

wondering if itd be easier to just replace the whole motor than try diagnose the problem

Here, would you like a bigger hammer?

Sounds like a pretty stupid way to solve something that could be as simple as a bad sensor.

[jost]

Double check the timing, if the exhaust cams are out by a tooth it wont trigger a CEL as there are no sensors on those cams. Then i\'d suspect water temp sensor next.

[tydon]

 boon']

[quote name='tydon said:

wondering if itd be easier to just replace the whole motor than try diagnose the problem

/quote]

Here, would you like a bigger hammer?

Sounds like a pretty stupid way to solve something that could be as simple as a bad sensor.

well ive replaced the afm,crank,cam checked leaks and none of those fixed it .

i know the guy who did the headgasket replacment is abit dodgy so wouldnt surprise me if he fked putting it back together again lol.

which only leaves a few things left to do but at this stage have lost interest in it as its been really really neglected bodys abit rough boost/vac hoses are all hooked up wrong just to many horey bits and pieces would need alot of TLC.

i dont think they guy who owns it will part with enough cash to make a deal with me lol.

[X]

get a compression test. if the guy did a head gasket job did he checked if theres are any cracks on the heads... most likely the engine is cooked or the heads are cracked by now?

[tydon]

hmm it just doesnt sound healthy at all idles on 3 cyls or less dies when warm wont start after it dies. i really wanted to save this wrx as itl be raped and pillaged more as it is some decent $$ spent and a tidy up would really make it a nice car

[Marky]

Sounds like you\'ll be buying into someone elses problem and having to pour more money into it than you would get back

Can pick up early untouched WRX\'s for not much $$ these days, why buy one which needs work unless it\'s *really* cheap - do your sums, does purchase price plus worst case (new motor? panel work?) come in lower than what it would be worth if you fixed it up?

[tydon]

 Marky said:

Sounds like you\'ll be buying into someone elses problem and having to pour more money into it than you would get back

Can pick up early untouched WRX\'s for not much $$ these days, why buy one which needs work unless it\'s *really* cheap - do your sums, does purchase price plus worst case (new motor? panel work?) come in lower than what it would be worth if you fixed it up?

absolutely right even though id really like to save it cost wise itl be a money pit that id never get my money on guy wants $2500 for it as is no wof or rego. front kits stuffed motor issues of somewhat. im happy with the RS and how it runs but i want the wrx body lol

[Roo]

Short of being a project car I think the worst thing to do is buy a car with issues

[tydon]

yeah im gunna stay away from it lol

[boon]

Since it dies when hot and you say the vac lines are all horryd up, have a look at the way the PCV valve is plumbed as that won\'t open until it\'s hot