Ok, so i have just finished refitting my type 4 2.0L engine after a rebuild. It starts up and idles fine (if over revving slightly) but when i pull off there is just no oomph, no accelaeration to speak of. i have only been round the block but i was struggling to hit 30mph. Any ideas? I am not expecting to get everything set up perfectly myself, but would like the engine to be running reasonably well so i can get to a man who can. timing has been set to 7.5 with timing light and carbs are weber ict 34s.
I'd get Fish.... http://www.vwfish.com/?p=home to give it the once over. He's great value and brilliant and definitely makes it to High Wycombe. Honest, for what he charges I'd give him a bell. He'd come....look....diagnose and cure. Triff. JMHO Jx
Bluebell, thanks, might give vwfish a try if all else fails. HorTs, the webers were on before the rebuild, but have gone for some slightly larger barrels and pistons (2056cc) so I dont know if that might have thrown everything out? Also a Scat cam, most other things are stock.
it might be that im sure mine is playing up when i go up hills stick some points and a condensor in it.
assuming jettings somewhere near (could be a bit out due to using lightly larger barrels) could be compression due to rings not settled in yet? id look at getting a basic tune done to make sure nothings wrong and everythings optimised then do a 1000miles or so to settle all the new bits in then get it setup on the rolling road
if you have only increased the cc by 50-60 jets will still be ok . check you vac hoses ,especially the servo ones
how did you set the timing? is there a scale on the fan fousing or is it missing? did you dial in the 7.5 degrees or use the scale? if your timing light has the adjuster and the engine has the scale make sure the light is on 0 and the pulley is at 7.5 on the scale. then rev to 3400 rpm and the mark should be about 25 - 28 degrees. if you have a vac advance then make sure the vac pipe is off if this is ok then look at fuel supply
mate if whs ^dont work ..give vw fish a bell ,i got a vwfish engine and never misses a beat ,bog standard 1.6 twinport and it goes over 70 on level ground ,uphill another matter lmao..............evrywhere i seem to travel involves uphills...
thanks for all the input guys. Jets i'm not too sure on - just as they were when installed. timing - mate who did most of the installation set this using timing light and scale. fuel supply - as far as i can tell this is all fine. I checked the ht leads, and i am sure they are all in right order, however, the one to the coil was a bit tired and too short really (wrong set of leads i think!). replaced the whole set and things are getting better. hills are still a struggle (which is a problem living in the chilterns!), so hoping an afternoon fettling with the carbs should get me near enough. any other thoughts or advice on fiddling with carbs much appreciated.
are you getting full throttle? are both carbs opening at the exact same time ? did you gap the spark plugs ? are both carbs syncronised using a snail manometer ? not sure with webbers but dells need specific float heights !!! do you have the webber book ?? you will need to find the jet sizes really
did you install the new cam correctly??? i don't want to make you doubt yourself, but it can still run if you're a tooth out, but be down on power
Check your fuel pressure first. No more than 3-4lbs for Weber IDF's. As for jetting a 2056cc you should have 50 idles, 120 mains, 200 air corr., F11 tubes 28mm vents. Be sure you have no vacuum leaks otherwise your chasing ghosts when trying to synch. Are you sure all your jets have NOT been reemed/Drilled? Float height for IDF's is 10-11mm with gasket in place and ball NOT depressed. You want the float resting on the ball but not depressing it. This is critical. The measurement for the drop is not as critical 28-32mm will suffice. Also be sure your linkage isn't binding anywhere between idle & WOT. IMPORTANT: Did you break in the cam properly? It must be run for 20mins or so at 2500RPM's for break in. Use of a straight (non detergent) oil is desired during cam break in.
Thanks again for all the pointers. I trusted the guys who did the rebuild so confident everything went together correctly, same for friend who helped me put it back in. Worked my way through all the pointers above and turns out i was only running on 2 cylinders. When i initially started having engine problems (which prompted the rebuild) i took the top off one of the carbs to have a look and i must have bent the arm attaching the ball-cock like device controlling the fuel level which meant that carb not getting its go-go juice. now everything is getting what it wants, wow, what a difference! the chilterns hills are not gonna cause any more problems, its lke driving a different van. once i have got a few more miles on the engine, i will give a proper review of the bits used for the rebuild. once again, thanks for all the input, much appreciated.
