911 88 carrera ....Help..sitting here and pulling my hair out

rokz · 06-09-2011, 02:53 AM

Any help would be very much appreciated..I have a 911 that will only fire up on 3 cylinders ..ie the right hand side looking from the back,i have sparks on all 6 cylinders. the car has been sitting up for approx 3 years now ....but sadly i am goin thru a separation with wife and and it must b sold.....but my children want a spin in it before it goes up for sale....so any help wud be gratefull... Dave

rokz · 06-09-2011, 02:54 AM

hi can be contacted also on rokz@oceanfree.net

fastfredracing · 06-09-2011, 03:05 AM

The injectors just may be stuck from sitting. Try lightly tapping on them with a screwdriver with the car running, they may just need a little help to "wake up"

rokz · 06-09-2011, 03:10 AM

will try that ...just seams strange it is only happening to one side....but goin out now to giv it a bash...sorry tap..lol thankyou

rokz · 06-09-2011, 03:16 AM

tried that with no avail....do u know can i take them out and test them...?

john walker's workshop · 09:47 AM

check for any corrosion on the black plug just to the right of the upper left rear shock mount. those injectors often get stuck after sitting a long time.

twistoffat · 06-09-2011, 04:13 AM

could be a clogged fuel distributor. A restart after three years usually requires new fuel. Its probaly that damp Dalkey climate

andyt11 · 06-09-2011, 04:38 AM

What John Walker said. Also, yes you can remove the injectors. I had the same problem after mine sat for 6 months last winter. Two were not firing.

Unbolt the fuel rail (don't bother disconnecting the fuel lines, too tight, not enough access and not really necessary), and then wiggle the fuel rail and all three injectors out. You may wish to pull the metal clips at the top of each injector first, that would allow them to come with the rail or if really stuck in the intake they would stay put and you can wiggle them loose individually later.

Once out, blast them out with carb cleaner or similar and put it back together. Don't forget to reinstall the metal clips at the top. Check for leaks once you turn the ignition back on. Keep an extinguisher handy.

Thats all it took on my car. From what I read three years will do it.

rokz · 06-09-2011, 05:03 AM

was just wondering wud it b to coincidental that all 3 on one side hav gone down in one go....cud there b some main plug that controls just the one side..?the car does start but will only run on 3 cylinders on opposite side....

twistoffat · 06-09-2011, 05:13 AM

I´m sure John will correct me if I´m wrong but as far as I am aware the Fuel distributor has two fuel outlets feeding fuel to the rails connecting the injectors. With all three down at one side I feel the problem is not necessarily the injectors but at the fuel distributor itself. I´ve gotten dirty fuel in Dublin more than once and if the cars been sitting for three years I figure its one to look at.

rokz · 06-09-2011, 08:57 AM

will unbolt the drain nut on the injection rail and see if any fuel is coming out.......not got a fire extinguisher.......b back soon lol

rokz · 06-09-2011, 09:48 AM

did get her started on all 6 cylinders after giving the injectors another tap....but alas....more problems after 10 minutes of running i switched her off......tried starting and wont start ....now no spark...HELP PLEASE

john walker's workshop · 06-09-2011, 09:48 AM

Quote:

Originally Posted by twistoffat

I´m sure John will correct me if I´m wrong but as far as I am aware the Fuel distributor has two fuel outlets feeding fuel to the rails connecting the injectors. With all three down at one side I feel the problem is not necessarily the injectors but at the fuel distributor itself. I´ve gotten dirty fuel in Dublin more than once and if the cars been sitting for three years I figure its one to look at.

no fuel distributor on 84-89 carreras. that's a CIS thing.

john walker's workshop · 06-09-2011, 09:58 AM

do you have a noid light that will plug into the injector plug? if it pulsates when the starter is operated, then that plug will work a good injector. there needs to be 12V at one of the terminals in each plug anytime the key is on. a test light will check that. the computer pulses the ground to complete the circuit.

rokz · 06-09-2011, 10:01 AM

Thanks john...think the fuel problem is sorted after tapping injectors she started up all good for 1o minutes untill i switched her off....now she wont start and no spark....?

rokz · 06-09-2011, 12:08 PM

jst checked the coil and no power......mmmmmm. wher do i start..? help

john walker's workshop · 06-09-2011, 12:25 PM

dme relay under the driver seat for starters.

rusnak · 06-09-2011, 01:30 PM

Could be the ignition switch too. Try pulling forward on the switch cylinder.

rokz · 07-01-2011, 06:19 AM

Help no hair left now...latest update.car will start when cold and after 10 minutes she just dies,and no sign of a spark ,and no tacho bounce when turned over,but can smell fuel.did check cht sensor with ohm meter and showing incorrect value...but wud this cause a no spark..? have read a few posts but they are a bit contradictory. also wondered does the dme relay have any relationship with no spark....really could do with some help lads ...need to sell her,living on baked beans now....lol

r_towle · 07-01-2011, 06:38 AM

yup, that would do it.
Get a new CHT.

Rich