Variable and lumpy idling. - Page 4

Laird Scooby · Feb 2nd, 2018, 13:01

Try disconnecting the MAF (just unplug it) and see if it will start. Chances are you have another problem elsewhere.

You could try squirting some Ezi-Start into the air intake while an assistant tries starting it to work out if it's fuel related. If it starts with Ezi-Start then look at the fuel pumps, their fuses and maybe the fuel pump relay.

Delta66 · Feb 2nd, 2018, 16:01

Started with the basics to fault find, spark plug out, it was dry, there was a spark, popped it back in and car started first time and running fine.

Delta66 · Feb 10th, 2018, 10:48

Variable idle has completely stopped. The car now revs happily over 5.5 thousand, which it was not so keen on before, but the lumpiness is still there. Decided to replace the HT leads.

Delta66 · Feb 15th, 2018, 10:19

New HT leads have made the car smoother again, but the lumpy idle is still there.

Now in the garage being MOT'd and they will have a look.

mocambique-amazone · Feb 15th, 2018, 10:45

Hi Delta.
Did you check.
-Throttle position switch, should "click" if you open the trottle slidly
-Gasket failure inlet manifold. Most of at cylinder 4
-spark gap?? and wich brand of sparks
-pull fuse number 1 with ignition of and wait 10sec. Motronic will be resetet

is your car a manual one?
1995 it should be with a M90, the double mass flywheel is cracked maybe
The vibration damper at the front of the crank is well known to rotate and produce bad vibrations.

good luck, regards, Kay

Delta66 · Feb 15th, 2018, 13:40

Spark plugs fine, the rest not checked. I will see what comes back after todays trip to the garage, which is going to followed by a couple of long trips to see a friend.

rippedoffagain · Feb 15th, 2018, 20:38

Unless you are lucky enough to find a proper old school garage with mechanics in it, they'll never think to do the user simple job of removing, cleaning and refitting the idle control valve. It's a half hour diy job even for someone with no mechanical skills.

Delta66 · Feb 16th, 2018, 17:01

The engine shake was traced to a leak in the inlet manifold gasket, which has been sealed (new gasket if it starts again).

I now have a smooth engine, with an even idle that is happier to rev higher than before. I am sure a few horse powers have been returned as acceleration feels a bit more lively.

The cost to solve all the issues was; sort idle control valve £0, did it myself, replace MAS £45 for part, fitted myself, plug leak in manifold gasket, free by mechanic doing MOT.

mocambique-amazone · Feb 16th, 2018, 17:54

my pleasure ;-)

Do it immediately, this seal won't last long (a week?) and will crack the gasket even more, with bad luck you will risk a burned piston, no joke.
maximum 1 hr job.
Regards, Kay

mocambique-amazone · Feb 16th, 2018, 17:56

Did you reset the ECU?

Feb 2nd, 2018, 13:01	#31
Laird Scooby Premier Member Last Online: Today 12:42 Join Date: May 2012 Location: Lakenheath	Try disconnecting the MAF (just unplug it) and see if it will start. Chances are you have another problem elsewhere. You could try squirting some Ezi-Start into the air intake while an assistant tries starting it to work out if it's fuel related. If it starts with Ezi-Start then look at the fuel pumps, their fuses and maybe the fuel pump relay. __________________ Cheers Dave Next Door to Top-Gun with a Honda CR-V & S Type Jag Volvo gone but not forgotten........

Feb 2nd, 2018, 16:01	#32
Delta66 Senior Member Last Online: Feb 23rd, 2020 19:46 Join Date: Oct 2015 Location: Erskine	Started with the basics to fault find, spark plug out, it was dry, there was a spark, popped it back in and car started first time and running fine.

Feb 10th, 2018, 10:48	#33
Delta66 Senior Member Last Online: Feb 23rd, 2020 19:46 Join Date: Oct 2015 Location: Erskine	Variable idle has completely stopped. The car now revs happily over 5.5 thousand, which it was not so keen on before, but the lumpiness is still there. Decided to replace the HT leads.

Feb 15th, 2018, 10:19	#34
Delta66 Senior Member Last Online: Feb 23rd, 2020 19:46 Join Date: Oct 2015 Location: Erskine	New HT leads have made the car smoother again, but the lumpy idle is still there. Now in the garage being MOT'd and they will have a look.

Feb 15th, 2018, 10:45	#35
mocambique-amazone Master Member Last Online: Jan 24th, 2022 17:08 Join Date: Nov 2008 Location: small village in the north of Germany	Hi Delta. Did you check. -Throttle position switch, should "click" if you open the trottle slidly -Gasket failure inlet manifold. Most of at cylinder 4 -spark gap?? and wich brand of sparks -pull fuse number 1 with ignition of and wait 10sec. Motronic will be resetet is your car a manual one? 1995 it should be with a M90, the double mass flywheel is cracked maybe The vibration damper at the front of the crank is well known to rotate and produce bad vibrations. good luck, regards, Kay

Feb 15th, 2018, 13:40	#36
Delta66 Senior Member Last Online: Feb 23rd, 2020 19:46 Join Date: Oct 2015 Location: Erskine	Spark plugs fine, the rest not checked. I will see what comes back after todays trip to the garage, which is going to followed by a couple of long trips to see a friend.

Feb 15th, 2018, 20:38	#37
rippedoffagain Premier Member Last Online: Nov 16th, 2019 18:20 Join Date: Mar 2009 Location: Yorkshire	Unless you are lucky enough to find a proper old school garage with mechanics in it, they'll never think to do the user simple job of removing, cleaning and refitting the idle control valve. It's a half hour diy job even for someone with no mechanical skills.

Feb 16th, 2018, 17:01	#38
Delta66 Senior Member Last Online: Feb 23rd, 2020 19:46 Join Date: Oct 2015 Location: Erskine	The engine shake was traced to a leak in the inlet manifold gasket, which has been sealed (new gasket if it starts again). I now have a smooth engine, with an even idle that is happier to rev higher than before. I am sure a few horse powers have been returned as acceleration feels a bit more lively. The cost to solve all the issues was; sort idle control valve £0, did it myself, replace MAS £45 for part, fitted myself, plug leak in manifold gasket, free by mechanic doing MOT.

Feb 16th, 2018, 17:54	#39
mocambique-amazone Master Member Last Online: Jan 24th, 2022 17:08 Join Date: Nov 2008 Location: small village in the north of Germany	my pleasure ;-) Do it immediately, this seal won't last long (a week?) and will crack the gasket even more, with bad luck you will risk a burned piston, no joke. maximum 1 hr job. Regards, Kay

Feb 16th, 2018, 17:56	#40
mocambique-amazone Master Member Last Online: Jan 24th, 2022 17:08 Join Date: Nov 2008 Location: small village in the north of Germany	Did you reset the ECU?

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)