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-   -   wont start from cold but will bump?? help!! (https://www.scoobynet.com/general-technical-10/889908-wont-start-from-cold-but-will-bump-help.html)

craig1990 24 May 2011 10:41 AM
wont start from cold but will bump?? help!!
 
my subaru turbo wont start from cold but once warm starts up or bumps from cold need help asap its like its just not wanting to go but smell of petrol. i know its not spark plugs as there brand new, help needed

DonNedly 24 May 2011 10:42 AM
tested the battery?

craig1990 24 May 2011 11:10 AM
?
 
yes mate battery fine whizzes over very fast

saiklon 24 May 2011 01:27 PM
When and how did the problem start?

scooby kid 24 May 2011 01:28 PM
coolant temp sensor?

Glowplug 24 May 2011 03:33 PM
Originally Posted by craig1990 (Post 10055333)
i know its not spark plugs as there brand new.
What did you fit and what did you gap them to??

craig1990 25 May 2011 11:35 AM
there bosch super 4s that i fitted also how do i test the coolant sensor? its doing my head in havin to bump it its been like it since i bought it but i got it cheap so couldnt resist

Glowplug 25 May 2011 11:55 AM
Originally Posted by craig1990 (Post 10057125)
there bosch super 4s that i fitted
Get them out. They are pre gapped to some thing like 1.6mm and are not adjustable.
You need NGK PFR6B's gapped to 0.65mm.

Ignore the CTS and any other sensor until you have swapped and correctly gapped the plugs.

Originally Posted by craig1990 (Post 10057125)
i got it cheap so couldnt resist
By cheap, spend plenty!

craig1990 25 May 2011 12:06 PM
will that be it them mate how come there meant to be the right 1s for subaru?

craig1990 25 May 2011 12:11 PM
could it be head gasket

Glowplug 25 May 2011 12:15 PM
Originally Posted by craig1990 (Post 10057159)
will that be it them mate how come there meant to be the right 1s for subaru?
It will certainly help mate.

Can you show me where these are recommended for a Classic??

Do a search on here and on google,
Impreza+bosch 4's=:nono:
Impreza+ngk=:D

The Impreza requires a gap of 0.6-0.7mm. The bosch are over double that, bound to cause starting problems.

The words cheap and Impreza do not bode well together. That goes for parts to. :lol1:

craig1990 25 May 2011 12:23 PM
ok so ngks should sort it?

Glowplug 25 May 2011 12:39 PM
Originally Posted by craig1990 (Post 10057184)
ok so ngks should sort it?
Gapped correctly, yes hopefully.:thumb:

It is the obvious fault atm with hard cold start. If you fit the NGK's and the problem persists then you have at least ruled out the plugs and can move on.
If you do not change the plugs then you could find your self going round in very expensive circles.

Found this: Impreza WRX Turbo 94-98 2.0L EJ20G
FR56-4PK or FR6DP1
gap= 0.8mm

Not sure which FR you fitted. Was it either of the above??

scottydog137 25 May 2011 09:09 PM
Originally Posted by craig1990 (Post 10055375)
yes mate battery fine whizzes over very fast

whizzes fast?

Has it had any work done to the heads recently?

craig1990 25 May 2011 11:20 PM
no work mate dont whizz over like theres nowt there but ano battery is reyt and theres compression just dont know if compression is low what should it be?


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