Rookie35

Hi, the stories goes bought an UK 03 plate wrx rolling shell, bought and built up an engine fitted it with sti inlet manifold, but still retained the wrx wiring and ecu. Ecu is looking for the tgv's which are no longer there but i dont think that will cause the problem below.

The problem is it wont start, pulled a plug out and checked for spark, it is only firing once on the first crank of the engine then not again????

Checked all wiring/ connectors, changed crank sensor, different coil pack, better earthing but it still wont fire up?

Any sugestions?

Thanks

Turbotits

iTrader: (2)

I wonder if the crank or cam on the sti use the same trigger configuration. Are the injectors pulsing on crank

Rookie35

Changed the crank sensor but not the cam as didnt have spare, pretty sure the injectors are pulsing, hard to tell with my hand still on the key, maybe need to get someone to help.

Turbotits

iTrader: (2)

Yea a noid light would be the thing to use. If you have injectors then you must have a crank signal

my94wrx

iTrader: (4)

did you use the correct crankshaft sproket as the trigger points are different through the years.

mbayley77

iTrader: (4)

Whats a noid light?

Turbotits

iTrader: (2)

Its a small light that can be pluged into wiring harnesess to see if they have power. In this case if you pluged one into the injector plug and cranked the engine it should flash as the injectors get a signal. There not to expensive and great for all sorts of electrical testing

Rookie35

Good point about the crank sproket, i used the one that came with the engine so guess its the correct one, but have used classic crank and cam sensors if they are different??
If it was reading it wrong would it spark but at the wrong times?

I blame mbayley77 as he sold me the car ha ha

mbayley77

iTrader: (4)

Your sparks been off for years!

Your right it was my car but i played no hand in building said engine

Doesn't make sense that it sparks to start with then stops. Come on Scoobynet members help him out and stop him texting me for ideas

Turbotits

iTrader: (2)

No its possible there wont ne any spark if you have the wrong triggers. I dont know if the newage ecu will work with classic sensors. May look at import car parts or similar for part numbers for classic and new age to see if there different

duds64

iTrader: (2)

you need the right trigger sprocket for the version of car/engine that you have

Rookie35

Just changed the cam sensor, checked continuity of the wiring from the cam and crank sensors to the ecu, also checked the injectors with a noid lamp they are doing the same as the plugs and only pulsing once then not again!

Just a thought the ecu is from a 01 wrx, it has been coded to the key by a local subaru expert, although i do have to press the lock unlock button on the key before i can crank it over. Is the 01 model ecu not compatable?? I guess as per the above statment it may be looking for a different trigger sproket?

Thanks

my94wrx

iTrader: (4)

have you checked the crank sproket yet?

ukimpreza

iTrader: (9)

id check crank sprocket as has same problem when i put a late a new age one onto a classic by mistake.

LegacySTi

iTrader: (13)

Is the inner crank pulley and cam pulley from a classic? If so they need to be changed to ones from a new age wrx. They are different.