Hi guys and gals, long time lurker here.
I have been using your forum for inspiration and tips and such when restoring my MK2 RS.
I was hoping the collected expertise of somebody in this forum could maybe help me with my problem.
To begin at the beginning, or at the start as it were.
I bought the car in 2009, after it had been sitting in a fjord, outside a shed beside the ocean since 1997.
The car was rough, but complete and needed some welding.
I started the restoration in february 2016 after pulling it out of storage, and was done around july 2017 after a long and intense restoration.
Have a picture of the offending offender:
One thing that had always annoyed me was the rough idle, and jerky running on low revs around 2000rpm, regardless of 1-4th gear.
Up above 3000rpm it was pulling along nicely, no jerking, also pulling nice under acceleration.
It's drivable, but the jerking starts when I'm below 70km/h in fourth gear.
The cam (Kent Cams fr32) had worn lobes, cam followers was worn out and noisy, and the compression was uneven between the cylindres.
It was running a 32/36 dgv weber, witch I overhauled with new gaskets and stuff.
I also had pressure in the cooling system, making the water not circulate through the heater radiator. (a heater is a nice thing to have in northern Norway during winter)
I replaced all followers and adjusted the valve clearance thoroughly. A little improvement, but the running was about the same.
So, in february I decided that enough was enough. I ordered a FR32 kit, waterpump, fuelpump, gaskets, vernier pulley, the whole shebang from Burton.
After removing the cylinder head I saw that 3 valve seats on cylinder 2 and 3 had cracks into water passages. The head was junk.
Great. I also found the block to be overbored to a calculated 2115ccm. Awesome
The head was a big inlet valve (44.4mm) head, with lightly ported inlets. Exhaust ports were stock by the look of them.
I had a 1986 sierra 205 carbed engine sitting so I pulled the head from that.
Then I went to town on that head with porting, 1.5mm skimming, grinding and polishing the combustion chambers and the exhaust ports as per David Vizards book.
I also cut new larger 3 angle valve seats for the 44.4mm inlet valves. The exhaust ones stayed 36mm but got cut with 3 angles, since I didn't have larger ones.
I used a neway kit I borrowed at a local business for the valve seat cutting.
Why not, right? I just wanted to get the best possible chance to get some more free ponies for my MK2.
Everything went smoothly together, it started up on the button, I got the cam run in and adjusted and the rough running was still there. Same as before.
It was way up on power though, much stronger torque, and top end power.
But I couldn't get the timing below 12-14 degrees because it would stall dipping below 12 degrees.
I replaced the distributor, with a distributor with accuspark electric system, no change.
I replaced the spark plugs with new ones, no change. New spark plug wires and new distributor cap, no change.
New coil, no change.
I thought it maybe was running lean on low revs, (even though the spark plugs looked nice) so I got a 38/38 solex EEIT from a granada 2.8,
I procceeded to take it completely apart, clean and assemble it. I threw it on the inlet and started the car up.
It was still running rough low down and upto around 28-2900rpm. But much happier throttle response, and faster pickup.
Played around with the mixture screws on it, got the engine running as best as I could. No FUGGING change!!
I'm at my wits end really, I just want to figure this problem out.
I just want to drive this old slag around without it jumping and jerking whenever I'm not flogging it around.
Please help a brother out.
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