Power after head replacement

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Re: Power after head replacement

Unread postby 'Scott.Edwards' » Mon Jun 23, 2014 1:52 pm

Hi Fred,

If you do take it out back and shoot it, please do post the video. : )

As far as setting it goes, you need a mirror to see the rear window, the
front one is easy.

Cheers, Scott




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Re: Power after head replacement

Unread postby 'Scott.Edwards' » Mon Jun 23, 2014 1:58 pm

Your next thing to look at, if timing is good, is a plugged converter.

All of these engines have old rubber on them, so after the converter check,
vacuum lines. These 2 items should be done, regardless of them being the
problem or not.

Cheers, Scott




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Re: Power after head replacement

Unread postby 'Mark' » Mon Jun 23, 2014 2:52 pm

As per my last post, is it a consistent roughness or a galloping sort of roughness? Once you determine this, it will help lead to the problem. Consistent roughness points to an issue which affects all cylinders such as ignition timing or cam timing. A non-consistent roughness would point to an individual problem such as faulty injector, bad spark plug, valve too tight, etc. Since you seemed to have lost power after you did a repair, this would rule out the catalytic convertor (unless the repair sat long enough for a family or rodents to move into it).



Mark




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Re: Power after head replacement

Unread postby Lee Branch » Mon Jun 23, 2014 3:16 pm

If you search for 'Bosch L-Jetronic' on the net, you will read that the attachment/placement/positioning of the injectors is immaterial as no timing sequence is required.

All injectors open simultaneously~ only the cylinder which has the inlet valve 'open' will induct fuel as the piston moves downward.




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Re: Power after head replacement

Unread postby 'Scott.Edwards' » Mon Jun 23, 2014 3:24 pm

Hi Mark,

I say cat could be an issue because he bought the LeSharo in boxes, not
assembled..... so there is no history of whether it ran fine before
disassembly. This was my interpretation only of the situation.

I may be wrong in my assumption, so good of you to spark up!

Cheers, Scott


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Re: Power after head replacement

Unread postby 'Mark' » Mon Jun 23, 2014 3:34 pm

Maybe the engine is running correctly and has no power(which is more or less
stock). If so welcome to my world ;). If he hasn't driven the unit before
the head change, that's another story. We need to get more details from
Fred.



Mark




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Re: Power after head replacement

Unread postby Rick Heslop » Mon Jun 23, 2014 8:01 pm

Fred,
Look in your service manual in regards to the vacuum system and the oritices that are in the actual hoses. Are they there?
Is there a difference in response whether it is cold or hot running?
Rick



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Re: Power after head replacement

Unread postby 'derfnarb@yahoo.com [Lesharo-owners] » Mon Jun 23, 2014 9:04 pm

I really dont have a cat. The last time it was checked they said nothing was left. I have had a plugged cat before. The engine sounds fair. I just cant get down the road very well. 40 is a top speed. Prior to loosing the head it was moving fine. I had a belt come off and it caused me to jump a timing belt.. I have checked and redone the timing so I dont feel this is the problem. I did find an emmision hose lose which evened out the idle but I still lack power. Would it be good to tighten the head bolts again. If all the head bolts lined up the head should be on right right? The head fell into place and the bolts lined up. This is frusterating but at least I can move it. Wish I could drive it though. I think this issue will be solved eventually.


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Re: Power after head replacement

Unread postby 'derfnarb@yahoo.com [Lesharo-owners] » Mon Jun 23, 2014 9:12 pm

I have owned this unit for 10 years. I know the power I should have. When I said I got it in pieces I mean I had someone else pull the head and the head came back in pieces because I was going to have it rebuilt but Mobility had a brannew one for the rebuild price. I could never get the mechanic back that tore it down. Thats why I got it in pieces.
I have worked on this over the years but never did a head job. Thanks. Im at a loss now.

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Re: Power after head replacement

Unread postby leo wigen » Mon Jun 23, 2014 9:21 pm

Have you checked the fuel pressure when you are driving ??


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