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Timing?
Topic Started: Feb 13 2011, 08:12 AM (2,786 Views)
Bobbert
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Ok, in the other thread I switched engines again. I purchased a engine and transmission assembly out of a 93 Geo Metro. I swapped everything that was different from 93 to the 91 items on mine. The engine runs great except from the time it gets to about 1200 rpm. It hesitates and then picks up. Almost the same sympton I had with the old engine. The timing is advanced all the way in order to get any performance. if I set it to factory it barely picks up and will back fire through the tbi. Before I bought this assembly it ran great with no issues. The only reason the car was taken off the road was that it was rear ended but still ran strong.
What would cause this type of hesitaion? I have about 175 psi in all cylinders at wot. It almost acts like vacume issues. Is the map sensor a good candidate or possibly the distributor? I have no codes in the check engine area.

Bob
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Bobbert
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There are 2 hoses to my distributor. I may have the vacume lines to the distributor backwards. The one on the tbi goes where and the one on the intake goes where?
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Memphis metro


Pull the cover off the timing belt and align your timing marks and make sure the marks are right and not off a tooth.
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Bobbert
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enginedoctorgeo
Feb 13 2011, 08:44 AM
Pull the cover off the timing belt and align your timing marks and make sure the marks are right and not off a tooth.
I did that before installing since I had a nicer cover to put on. They are right on.
Thanks
Bob
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Memphis metro


Vaccum usually causes high idle. Let me ask you about the timing marks again. Did you put a timing belt on it? If so after you installed it did you rotate the engine over a time or two and recheck the marks? Dont mean to agitate you but it sure sounds like its not right.
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Bobbert
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enginedoctorgeo
Feb 13 2011, 08:54 AM
Vaccum usually causes high idle. Let me ask you about the timing marks again. Did you put a timing belt on it? If so after you installed it did you rotate the engine over a time or two and recheck the marks? Dont mean to agitate you but it sure sounds like its not right.
Before I purchased this engine I drove the car since it only had rear end damage from an accident. It did not have this symptom until after I switched over all the 91 parts. It is really agitating me. :hmm
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Memphis metro


Maybe your fuel pump is going south. Check your fuel pressure.
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Bobbert
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enginedoctorgeo
Feb 13 2011, 09:34 AM
Maybe your fuel pump is going south. Check your fuel pressure.
Ok, so I have a leaking water pump gasket. I follow the book and remove everything. I decided to check the timing marks. I took pics so you could get me on the right track. The bottom is right on the mark but the top one seems out of place. It is exactly as I took off the belt. The white marks were already there.

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By mopar at 2011-02-13
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By mopar at 2011-02-13
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By mopar at 2011-02-13
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Memphis metro


The timing mark on the cam gear should line up with the mark on the cover in the red box,

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Bobbert
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enginedoctorgeo
Feb 13 2011, 04:45 PM
The timing mark on the cam gear should line up with the mark on the cover in the red box,

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In the book it pictures the little hole with cross hairs on the cam gear as the mark for the v notch. There is a big white mark as you can see on the front and a small white mark on the top tooth to the left of the v notch. When I try and turn the cam gear white tooth to the v notch I can't hold it for long until it slips back to where it is know. It's getting just a tad frustrating.
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Memphis metro


Pull out the spark plug nearest that cam gear and spin it around till you see the piston all the way up. Stick you a screwdriver down in the hole if you have too and feel the piston as it comes up. The correct timing mark or tooth on the cam gear should be real close to the notch in the red box. With the piston up you will know you have it on comression stroke on number one. Forget all about the white marks.
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Bad Bent
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Facetious Educated Donkey

Bobbert
Feb 13 2011, 08:23 AM
There are 2 hoses to my distributor. I may have the vacuum lines to the distributor backwards. The one on the tbi goes where and the one on the intake goes where?
This is a pic of the sticker on my '91s hood.
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The "gas filter" filters gas/vapors going to the distributor.

Yes, aligning the cam gear timing marks can be frustrating, you are working against the valve springs. The key will be to align the marks, regardless, and then turn the engine over twice (crankshaft) and the marks should re-align. It is not any easier if the engine is at TDC which is a good starting point.
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Bobbert
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Bobbert
Feb 13 2011, 04:51 PM
enginedoctorgeo
Feb 13 2011, 04:45 PM
The timing mark on the cam gear should line up with the mark on the cover in the red box,

Posted Image
In the book it pictures the little hole with cross hairs on the cam gear as the mark for the v notch. There is a big white mark as you can see on the front and a small white mark on the top tooth to the left of the v notch. When I try and turn the cam gear white tooth to the v notch I can't hold it for long until it slips back to where it is know. It's getting just a tad frustrating.
Heading off for Church and will try that tomorrow. So easy, I forgot about that. I already have the plugs out.
Thanks
Bob
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Bobbert
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Well, finally finished. I set number 1 at TDC, rotor pointing at number one spark plug wire, crank pully dead on the mark, cam gear mark dead on, installed the belt, rotated the assembly twice and it was still on. Have the same bog, up off idle. I have the timing maxed out to get any kind of performance. I did put 5 gallons of fresh gas with a cleaner mixed in.
Now what? :smackface
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Memphis metro


Question, what is the timing mark on that cam pulley? Do you have a picture of a cam mark on that pulley? Just looking at the rotor under the distributor cap is not good. You could mis eye ball it and still be off a tooth. You need to find the timing mark on that cam gear and align it 100% to the notch.
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