Got my impreza had it bout 6months now it never has started properly from day 1. ive had the coolent temp sensor changed and had the plugs changes still the same problem any ideas. when its warm it seems to fire up instantly like it should do at any time, but as i say a morning start takes a while and so does a cold start if you leave it to cool down, day at work ect. whats the problem cheers people.

 

hiya what model newage or classic any cell light could be cam sensor as this effects starting and gets worse if it isnt replaced so ive been informed by my garage

 

there should be some sort of cold start sensor that tells the ecu to deliver more fuel,but i dont no were it is.as far as cam sensor u would have trouble starting it when hot aswell.

 

My 03 STi has "bouts" of poor cold starting. It'll go for weeks starting first time "on the button" then suddenly it'll have a few weeks of cough and splutter before it properly catches! Sometimes holding the throttle open a TINY amount helps, but not always.
New plugs, clean and check the crank/cam sensors, different fuel etc make no difference.

JohnD

 

ive changed the plugs and done the coolent temp sensor got no CEL light. its a classic 95. it must be some sensor its the early version 1/2 if some one knows please tell me its making me go crazy looking like a right c**k starting the car in the morning just want it to be as near to prefec as i can get the car

 

starts fine when warm

 

i had a the same prob with mine, with CEL was saying coolant temp sensor, before i change any sensor i always check the loom/multi plugs which in this case turned out to be a pin on the multi plug had slightly dislodged.

 

dont think its that but could give that a try

 

Can you hear the fuel pump coming in? You could try turning the ignition on for a few seconds, then turn it off. If you do this a few times and then the car starts quickly it is a fuel pressure issue. More than likely the system is losing pressure somewhere. It could be the fuel pressure regulator or the pump allowing bleed back.

 

tried that primed it twice and still same problem may try a third

 

Just a thought. Have you tried injector cleaner, if the spray pattern is more of a jet then that would not help. On previous cars I found STP a good product, drove the car a few miles to work parked up all day then drove home left all night. On the in car MPG unit it went from 35 to 50 MPG on a motorway run in a week. For £5 could be worth a try if you have not already.
Best of luck Steve.

 

ive put 2 bolltes of redex through it mixex with each tank of fule not all in one go. and no difrence. i know the coolent temp sensor has a browken clip but it does get a grip and ive got engine builder silicone on it just a dab to keep it there but may be a loose conection. its quite frustrating. are the coil packs a culprit?? i cant see them being under to much stress just starting, im running in a new block atm so i cant boot it to see if i have a missfire got another 400miles and a remap before i can do that

 

Igniting a cold fuel mix is harder than once the engine is warmed up. So if the coil packs are tired then that could be the problem. If you can try a mates coil pack then that might rule it out or as the culprit.

Best of luck, I know what you mean asmy GEMS is a sod to start on a cold morning.

 

its abit of a pain its the 4 independent coil packs i may buy 1 and just go through 1 by 1

 

btt any 1 else would be nice to hit the nail on the head

 

btt

 

Could you not have a 'lazy' ignition amplifier module (or ignitor pack as it's often referred to)?

 

If your engine has the tappet adjusters for the inlet n exhaust valves, check the clearances. They may get tight when the engine is cold giving you no compression!

 

right havent got a clue of how to do that hobstar im abit blanck when it comes to engines, would this be a very bad problem to have as it seems to run perfect when warmed up. and joz are you refering to the coil packs?? as i am having the car remapped on the 10th and will find out then as it will missfire if they are breakingdown. cheerz , m@t

 

No.

It's this thing:-

93 94 95 96 Subaru Impreza IGNITER:eBay Motors (item 120420364201 end time Jun-12-09 23:43:37 PDT)

 

never seen the thing before where is it located on the engine?? and would this throw up a ecu code

 

its located behind the boost control pack on the O/S/F suspension turret

 

im going to clean the idle valve wednesday as that may be a contributing problem (it does dip alittle on idel) and then go for the ignitor pack will let you know how it goes

 

Before you start buying loads of sensors etc get a voltmeter on all the associated sensors, pins and check there is not a problem there.

May sound strange but have you checked the timing? Did you fit a brand new tempsensor or a used one. Ignitor packs rarely fail.

Your Tappets are not adjustable so rule that out.

 

Has your car been mapped?
Mine was done by one of the guys that is well respected and the following day the car was a pain to start from cold as it would cough and splutter around 200rpm before shooting up to 1200 and fill the garage with some nice fuel smoke. If it failed to kick in first time the second start would require cranking for about 5 seconds before it fired up. I explained this to the mapper who told me that it was normal and said it could be my injectors.
I ended up having another remap by another tuner and I have not had the issue since, starts first time, every time from cold

 

the car has been mapped but its not down to that as it did it before it was mapped. how do i check the timing? it is getting remaped on the 10th (next wednesday). i used a brand new coolent temp sensor, and cleaned the idle valve, ive replaced the plugs. now im looking at the fule filter?? and crank sensor? need sum input its pissing me off. only when cold or left for longer than 10mins

 

i had the same problem a few years back on a 94 standard turbo, plugged it in to the dealers diognostic thingy with no faults showing, mechanic said it was either the co sensor or the mass air flow sensor, co sensor was about £20 mass air sensor was about a grand. i changed the co sensor and it sorted it for about 3 weeks, part exchanged the car not long after.
i hope its not the latter mate.... hope this helps

 

Do you mean it cranks for ages before it fires then when it does it's fine once started?

Or do you mean it'll fire but not idle unless you rev it up and will not idle/run right until it gets some heat into it?

If it's more the latter (as mentioned above) you could have a compression issue (ie lack of) whe cold.

 

cranks for ages and the all is ok.... co sensor ??? may sound stupid for that but hit me with it

 

If you were quoted a grand for MAF you were bein RIPPED off bud!!! Try £80!! Hope you didnt sell your car cus of this!!

Or your thinkin of sumink else