Still having troubles with cold starts, doesn't seem to want to pull fuel in, I've swapped out the starter for a high tourqe one so its cranking at a good rpm. Any ideas? If I blow into the two plastic vents on top of the carbs it starts right up, and once it's built up some heat it will start on it's own.
I own a 1979 MK1 Rabbit and recently got the 16v bike carb (R1) set up running. I'm experiencing issues with motor vibration and fuel pressure. The rough fuel pressure may be contributing to the vibration of the motor but it is quite insane. The motor vibrates likes its on a shaker table and it's annoying the heck out of me. Cold starts especially and gets a little better after the engine warms up, but still noticeable. What could be the culprit? The engine mounts will soon need to be replaced but I feel like it's much more than that.
The fuel pressure is inconsistent. I sometimes get 2.5 - 3 psi but today seeing only 1 psi. I'm running a Carter fuel pump and Holley FPR with 1.75 main jets. Should I go up to 2mm jets? I did notice fuel seeping out of the carbs, could that be contributing to the loss in fuel pressure?
Any input is much appreciated.
I haven't any problems starting on 10w30, but when i changed it to 50 weight full racing oil, I did notice that cold starts are taking a long time. I have to prime the carbs for a little and then play with the throttle to get it started. Once the car is warm, no problems.
going back to filter conversation from a while back. i decided to get k&n universal cone filters RU-2320 or RU-2930.
the 2320 is slightly (0.8cm) longer than 2930, but other than that they are both identical. does it matter which one i pick in terms of performance?
Last edited by rysskii3; 06-26-2012 at 08:15 PM.
Last edited by rysskii3; 06-27-2012 at 02:21 AM.
With the difficult startups you guys were talking about earlier..... do you have a choke cable setup? I had problems initially but once I hooked up the choke I can start my little pig anytime regardless of the weight of the oil.
On another note.... any of you guys having problems with oil pressure blowing out your seals? I have changed both my front and rear mains twice now and that works fine for a short time but I start leaking oil like a little bish. Its getting terribly frustrating. I installed a catch can which I thought would help but I am still leaking and also noticed oil coming up around the bushing around the distributor even though I have changed those O-rings twice as well.
@ rysskii3: Just run a piece of vacuum tubing into the cabin so you can blow into the carbs from the driver's seat, problem solved!
@ funpig: Are you running an 8V or 16V? If an 8V, what valve cover are you using and is the screen on the PCV port clean and clear?
SAABMAN.. I'm running an 8v with a corrado valve cover and a catch can. No leaking from the top but the bottom end leaks oil like a little MOFO. Getting tired of the spots underneath all the time. Have changed out my seals front and back twice and am looking at changing out my distributor from the 1.8/2.0 combo with TT bushing to the 2.0 with the guts/4window of the 1.8 so that I can seal up the distributor whole better.
IIRC, none of those seals are under any pressure are they? the only oil that hits them should be oil bveing splashed around from the crankshaft or the cams for the distributor.
Feel free to follow me on instagram @wesmurphy for pictures of bikes, bimmers, vws, etc
So heres a pic of my bay. (i know...more whoring)
YEAYEA... there shouldn't be that much pressure but I know on startups my oil pressure gauge hits 100psi for a few blips before it settles down as the motor and oil warm up. same as it has always been on my caddy.
Oil pressure numbers at cold start sound right, but OTH yeayeayea is also correct that none of those seals should see that kind of pressure. I'd check the inside of the valve cover to make sure the port is clear and maybe you need a larger hose to the catch can? If you think about it the ABA was designed with the block breather setup, too, and with that blocked off in this application it may need more flow out the top. The hose you have running to the catch can looks much smaller than that PITA plastic tube that runs from the block breather PCV valve on the stock ABA setup.
Last edited by YJSAABMAN; 07-01-2012 at 10:45 AM.