Hunting/Stalling/Rough Idle and Knocking
Posted: 15 Jun 2014, 17:22
1990, 1.9L DG Petrol, Automatic, LHD [New(ish) engine in feb from a syncro]
Some advice please.
When we left the campsite today the van was idling nicely and drove away fine for about 2 miles. At that time i felt a slight miss or stalling going on and it didn't get better. at the T- junction it stalled, but fired right back up and i was able to carry on.
When i sped up i think it went away briefly but came back again and had to use neutral to keep the revs up. when i was able to pull over i kept it running, but without some throttle, it would died straight off, other wise it would run but was hunting (revs continually going up and down). After about 5 min or so i carried on and it seemed OK for another 8 miles until it started again, but not for long but it never died on me.
(just remembered- the 1st and 2nd times i was on a straight stretch of road, but in-between was a winding B road)
Get home, and while backing up into my spot it starts hunting again, but didn't stall.
Engine lid off and i check the following:
fuel filter- looks new and clear with a light shining through-but will get a new one as it's about 2-3 years old i think
vacuum hoses- were all replaced in the spring, all there all tight
removed and tested idle stop solenoid- works fine
dizzy cap and rotor- rotor looks a bit old but OK, will get a new one anyway
Little fuel screen in the carb where the feed line joins- a couple of very small specks, but nothing that would cause this. Cleaned and replaced
Ign coil-cold to the touch
fuel pump- cold to the touch, took off hose and cranked engine, good amt of fuel pumping through. have a good 2nd one so i might swap to see what happens any ways
I did note that the fuel from the carb at idle was not a nice steady flow (the reason for the hunting). I sprayed around the carb with some WD-40 to see if there might be a small vacuum leak, but the engine never altered.
I seem to recall the old engine doing this to me a few times, so i don't think it is the engine itself at fault
The knocking has always been there and when i used a long screwdriver to listen it sounds like the fuel pump- or at least that's where the sound is loudest. but at its base it's quite. but like i said it was pumping what looked like a good amt, but will swap it to see if the knocking goes away.
Can't think of anything else that stood out, but better to give as much information as i can to help any reader.
Cheers.
Some advice please.
When we left the campsite today the van was idling nicely and drove away fine for about 2 miles. At that time i felt a slight miss or stalling going on and it didn't get better. at the T- junction it stalled, but fired right back up and i was able to carry on.
When i sped up i think it went away briefly but came back again and had to use neutral to keep the revs up. when i was able to pull over i kept it running, but without some throttle, it would died straight off, other wise it would run but was hunting (revs continually going up and down). After about 5 min or so i carried on and it seemed OK for another 8 miles until it started again, but not for long but it never died on me.
(just remembered- the 1st and 2nd times i was on a straight stretch of road, but in-between was a winding B road)
Get home, and while backing up into my spot it starts hunting again, but didn't stall.
Engine lid off and i check the following:
fuel filter- looks new and clear with a light shining through-but will get a new one as it's about 2-3 years old i think
vacuum hoses- were all replaced in the spring, all there all tight
removed and tested idle stop solenoid- works fine
dizzy cap and rotor- rotor looks a bit old but OK, will get a new one anyway
Little fuel screen in the carb where the feed line joins- a couple of very small specks, but nothing that would cause this. Cleaned and replaced
Ign coil-cold to the touch
fuel pump- cold to the touch, took off hose and cranked engine, good amt of fuel pumping through. have a good 2nd one so i might swap to see what happens any ways
I did note that the fuel from the carb at idle was not a nice steady flow (the reason for the hunting). I sprayed around the carb with some WD-40 to see if there might be a small vacuum leak, but the engine never altered.
I seem to recall the old engine doing this to me a few times, so i don't think it is the engine itself at fault
The knocking has always been there and when i used a long screwdriver to listen it sounds like the fuel pump- or at least that's where the sound is loudest. but at its base it's quite. but like i said it was pumping what looked like a good amt, but will swap it to see if the knocking goes away.
Can't think of anything else that stood out, but better to give as much information as i can to help any reader.
Cheers.
