Hi guys,
What can cause a '93 wrx to be slow starting from cold? spins over fast enough, but takes about 3-4 seconds to fire!

When engine is hot it fires straight away!

If engine is warm, ie left for half hour, then it takes the 3-4 seconds again.

........and to really throw a spanner in the works, if the car hasn't been started for a week or so then it'll fire straight away

wot u reckon?????

 

dirty plugs? coil packs on the way out? starter getting old? just a few guess's

 

nah, did the plugs + gapped, coilpacks good, spins over fast enough

cheers for the input though

 

Battery getting a bit tired? when left for a week the battery recovers, l would get it checked.

 

at least it will alow a bit of oil pressure to build up

 

I can't see it would be the battery, if the cars spins over at a fair rate of knots

are there any sensors anywhere that could cause this?

 

still can't figure it out

 

Do you hear the fuel pump prime the rails when you turn the ignition on just before cranking ? if not this wont help as the engine is turning over while the fuel pump is building up the pressure , hense takes longer to fire .

 

yep, all sounds fine with fuel pump! (although, you can hear a slight gurgle.....possable bubble sound)

I'm sure it's always been like that though

cheers

 

mine has the same gurgle on my94 uk always wondered what it was, thought someone was sat under the bonnet downing a beer lol

 

If you can get hold of a timing gun , you can put the inductive pickup on to each lead and see if it has a spark on cranking .

 

If the battery is getting on then this could have an adverse affect on starting when the engine is being cranked. This is due to the battery not having enough power to feed all the other electrics whilst turning the starter motor. As the starter motor circuit has the lowest resistance thus takes the largest current. If possible either borrow a battery or try slave starting using a second battery, to see if this improves things. The other thing to try is cleaning all the earth connections which if they are coroded will limit the total power avaliable. Hope this helps Steve

 

cheers guys,

well I tried another 'big' battery on it and it's exactly the same????

I dunno