95 geo needs help!

Dale002 · 10-05-2008, 11:40 AM

Hello Everyone,
Our 95 geo does not wants to stay running when the engine is cold.
it will start but,would not stay running.
It also running really rich all the times.
I just changed the head on it, it has new plugs. i did not change the wire because they are only a few month old and I did not have this problem prior to changing out the head. I have no engine check light on and I have checked it and it works. I had some problems setting the timing on it.
My shop manual say to line up the crank punch mark with oil pump pointer and the cam pulley scrive mark with the valve cover V mark.
When I look at my cam pulley it has two marks. One is just a scrive and the other is a scrive with a bump. Which one do I use?
Also it seems the distributor will only sit flush when time using the scrive and bump mark on the timing pulley. Do this distributor only go on in one position? I've checked for spark and it's a orange with some blue.
Comp is 165,160,165 I've checked all vacumn hoses. I also noticed that their seems to be alot of pressure in the fuel tank. When I removed the cap I can hear it escape and can smell fuel.

Johnny Mullet · 10-05-2008, 09:52 PM

The compression should be more like 200 if it's a new or rebuilt head. I think you have a timing issue. Here is a pic of mine...............

Looks like the "bump" is on the bottom on mine.

Dale002 · 10-06-2008, 05:58 AM

Thanks for the promp reponse.
I believe it's a timing issue as well.
Ok,this is where is currently timed. Bump is back on the bottom.
one of the other issue is that I can't installed the distributor with the pointer pointinting to #1 cylinder. (The #1 cylinder is at the top of the distributor, right?) It will not go in all the way . About 1/8inch from bottoming out on the housing. Will slip right in if the pointer is facing down or 180 off.
The cam end seem alittle different new from old. That end of the cam seems more heaftier then the new. Do this distributor go on in either position? Where their any cam issues to where it would need a different distributor?

codyb76 · 10-10-2008, 01:20 AM

distributor will only go in one way. It is fool proof. I don't think you would need a different distributor as far as i have ever seen. Just a thought, i have seen cam pulleys with two dowel postions on them. Is it possible that you are on the wrong dowel hole?

Dale002 · 10-18-2008, 08:54 PM

I'm sure I have it timed correctly. I think I may have a fuel problem. When I did a fuel pressure check I found the pressure leaking thru the fuel injector. I've replaced the injector but,Still same problem. She floods out and will not start. I have to pull the fuel pump relay to get it to start. She will run until all the fuell is burnt.

Old3banger · 10-18-2008, 10:55 PM

While I'm left to guess that by "scrive" you meant Scribe, there's no question about "a bump" on later cam sprockets' spoke.

Quote:

Originally Posted by Dale002

When I look at my cam pulley it has two marks. One is just a scrive and the other is a scrive with a bump. Which one do I use?

IMO Johnny Mullet's photo shows the cam 180 degrees out. This photo plainly shows the 2nd mark, which is between 2 spokes, aimed at the cam cover V mark. According to GM copyrighted procedure my dealer printed out for me, the spoke w/"a bump" & "scrive" mark should align w/"V mark on the cylinder head cover". The dealership Chevy Metro mechanic is instructed to position the later style cam sprocket w/spoke pointed straight up at the V mark, NOT the space between 2 spokes.

codyb76 · 10-19-2008, 02:06 AM

can you see fuel running into the throttle body when you see the fuel pressure dropping?(i presume when the key is cycled on and off, not when the engine is running) If you only changed the cylinder head, i can't see the injector or fuel system being any different than before. If it runs ok until it runs out of fuel then it would appear that your timing is ok. I don't think you would see 160+ compression if your cam/crank timing wasn't right. Something to check might be to make sure your return line isn't plugged, causing way high fuel pressure. What pressure are you seeing now?

codyb76 · 10-19-2008, 02:08 AM

i have also once seen the lower fuel injector o-ring out of place or torn. This just poured pressurized fuel down the throttle body when the fuel pump cycled.

Old3banger · 10-19-2008, 12:03 PM

Can't have it both ways.

Quote:

Originally Posted by Dale002

Also it seems the distributor will only sit flush when time using the scrive and bump mark on the timing pulley. Do this distributor only go on in one position?
I believe it's a timing issue as well.
Ok,this is where is currently timed. Bump is back on the bottom.

Is the printout I received directly from GM, showing the spoke w/"bump" pointing up at V mark, in error?

Dale002 · 10-19-2008, 01:32 PM

Quote:

Originally Posted by codyb76

i have also once seen the lower fuel injector o-ring out of place or torn. This just poured pressurized fuel down the throttle body when the fuel pump cycled.

Thanks you codyb76!
Found this to be a problem. Double o'ring until I can get a new one.
Engine starts with no flooding. Stills seems to be running rich but will see after a set the timing and replaced the o'ring with the correct one.