no power or acceleration

[ugly american]

hy72 van idles very well. brand niew carburetor (pbic 32) niew rotor,niew bougie,niew plugs etc. timing is good. when i accelerate ,the motor does not seem to get to the top of its RPM's. when i put it in gear it is SOOOOO slow. not the normal slow. what can this be? the valves were set (warm) should i set them again? or is this a distributor problem? i rebuilt it but maybe the weights arent spinning out? but then would it sputter if that were the case? confused.

bedankt!

-gregor

[ghys]

Is the engine runs well?
Condensator maybe if he don't acceralate and sound bad

[Joost]

is it the original carburetor? Are you sure the right jets are installed?

What is the reason to change the carburetor? Maybe you can mount the old to check if it runs ok with that one.

Normally with a new carburetor you have to adjust it again. (for example the main jet)

[ugly american]

bedankt voor de replies

the carburetor runs well on my other hy van ,in fact much better than the Zenith 19mm i removed. i will try to run it with the old carburetor, that is a good suggestion. He runs fine at idle but just does not sound like he is reaching top stroke. is it possible that i may have adjust the kleppensteling /valves wrong a bit? he starts right up no hesitation. idle sounds good but there are a few sounds of air escaping at startup then he runs ok. i replaced the condenser. i think it may be the weights in his distributie ? thank you guys for the help!

-gregor

[ugly american]

is it the original carburetor? Are you sure the right jets are installed?

What is the reason to change the carburetor? Maybe you can mount the old to check if it runs ok with that one.

Normally with a new carburetor you have to adjust it again. (for example the main jet)

hoi joost,
de carburateur laat hem sterker rennen! de oude carburator loopt prima.

bedankt

-gregor

[Joost]

ok if you have tested this caburetor on another van than it should be ok.

Since you worked at the distribution, are you sure the timing of the camshaft/ crankshaft is ok?
1 tooth wrong can cause this types of problems.

I think its good to check everything, start at the basics.
- timing of the camshaft
- clearance of the valves
- timing of the ignition
- maybe a compression test?

[ugly american]

joost,

i will do that ,i think it is something that has developed. i had him running for the first time for about an hour and he ran well enough, but then the next day this happened. either the rings are bad (compression test) or the valves may have moved from heat.

[TypeH56]

Fuel delivery, filter or pump

[ugly american]

Fuel delivery, filter or pump

checked both! good fuel supply good filter.

i have discovered that there are two notches for the timing mark on his flywheel. the first one is 180º from the second. the second one looks like where cilinder 1 should be the second is on the motor side and seems wrong but that is where it was running. why are there 2 timing marks!?

[Ree]

hy72 van idles very well.

It does so if you wire the spark plug 1-2-3-4 instead of 1-3-4-2. Could also be that your timing is significantly off. I'd start checking the ignition circuit from the beginning and don't rely on marks other people have put on your flywheel

[ugly american]

i have tried the timing (1-3-4-2) from the 'back' of the motor as cilinder 1 (towards the waterpomp) and then again from the front of the motor (towards the gearbox) as nummer 1. my other two HY vans run fine and their timing is set using the cilinder closer to the waterpomp as #1. the timing mark i am using are the notches that the pin will fall into to get top dead center (12º before) there are definitely 2 notches in my flywheel. the second one is 180º from the first one. so i tried both. still getting terrible problems running it. i am going to try switching it back to the first cilinder being #4 and resetting the valves. that is how all my other HY vans run. i have never seen two notches on a flywheel. it is very confusing.

[LEiPiE]

As far as I know the flywheel doesn't have two notches, but a full cycle of the motor (as in: every cilinder has had its explosion) equals two rotations of the flywheel.
You need to enable the pin when the distributor is pointing to the cilinder 1 cable, this is - when the distributor cap is off - you can see the rotor pointing towards the waterpump.
That's the correct calibration point, if I remember correctly.

[ugly american]

As far as I know the flywheel doesn't have two notches, but a full cycle of the motor (as in: every cilinder has had it's explosion) equals two rotations of the flywheel.
You need to enable the pin when the distributor is pointing to the cilinder 1 cable, this is when the cap is of that the rotor is pointing towards the waterpump.
That's the correct calibration point, if I remember correctly.

bedankt voor de replies!

Leipe -
that is also my understanding. i will report back with results.

dank je !
-gregor

[ugly american]

Fuel delivery, filter or pump

hoi,

het bleek zand in de carburateur te zijn! ik had het brandstoffilter gecontroleerd (in de brandstofpomp zit een filter die schoon was) ik controleerde ook of de carburateur gevuld was met brandstof in zijn kom. na het drie keer instellen van de kleppen, controleerde ik het brandstoffilter dat zich in de carburateur bevindt en vond er wat kleine hoeveelheid zand in! ik heb de carburateur gereinigd en opnieuw geplaatst. hij bleef een beetje luieren en toen was het ineens prima, alles wat geblokkeerd was, was opgeruimd! hovelt goed!

bedankt !
gregor

[ugly american]

hmm?

i have him running and idling well ,and he accelerates fine. but now when i put it in gear it goes so slow. i was driving flat and it was moving very slow, then i got to an uphill road, and he could not make it up. i had the pedal all the way to the floor! i had to go into neutral and coast backwards down the hill.no power, what could this problem be? help! thank you!
-gregor