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Discussion Starter · #1 ·
Here is what I have:

1998 escort with the 2.0 sohc

What happens is when I turn the car over it sounds like it is trying to start but just will not and I sometimes get backfires.

I have checked the timing belt it is there and the timing marks are in place (yes the cam turns):smile5:

There is is spark to the plugs (new plugs I installed after the starting problem):smile5:

There is fuel pressure in the rail (if I press the valve in gas comes out) I do not know the pressure that is present

I tried unplugging the MAF to see if it would start....it did not seem to any difference at all.:frown5:

I am going to buy a code checker to see if anything shows up. Since the "service light" stays on when it isn't started I don't yet if there is a problem code. I will get back to you on that.

Any Ideas?
 

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Geeez,
You joined two minutes ago, and already you're asking questions!

Just kidding

Codes will be most helpful.

Backfiring, as you already know is often due to bad valve timing.

I guess it could also be ignition timing, so I would disconnect the crankshaft position sensor and reconnect it to possibly clean any dirty contact there (on a whim). Otherwise check and clean the little grounds, esp the one to the PCM.
 

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Discussion Starter · #3 ·
The valve timing seems to be correct. I checked the timing marks and then verified as best as possible by checking that the #1 piston was at TDC and that the valves were closed when the camshaft lines up with the timing mark. All seems good there.

I kind of thought (and hope) it would be a sensor problem. I should have the code reader and then check it by lunch.
 

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Discussion Starter · #4 ·
UPDATE

Starts and will run if I hold the throttle about half way or more. The engine dies if I try to let it idle..(let off the gas)
 

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Vacuum leak,Bad EGR valve, Bad TPS... These are the places I would check... There are posts that tell you how to check these sensors & how to diagnose a Vacuum leak..
 

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Discussion Starter · #6 ·
I haven't found any vacuum leaks, however I did find the hose on the pcv valve was rotten so I replaced it. It is a little better but still not right.
I will look the posts on checking those sensors. Thanks
 

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I haven't found any vacuum leaks, however I did find the hose on the pcv valve was rotten so I replaced it. It is a little better but still not right.
I will look the posts on checking those sensors. Thanks

http://www.fordforumsonline.com/for...lean-your-idle-air-control-valve-iac-iab.html

http://www.fordforumsonline.com/forum/engine-drivetrain/94-locate-vacuum-leak.html

http://www.fordforumsonline.com/forum/engine-drivetrain/308-howto-check-fuel-injector.html

There's another one that describes The MAF & TPS somewhere.. These are the most accessible ones...
 

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Discussion Starter · #8 ·
well I got it running, but suddenly I have a loud knocking.
I got it running after disconnecting and reconnecting the plug to the camshaft sensor.

I took off the valve cover and the valves all operate good with no slack so I feel like the valves are not bent and seating properly.
The pistons are moving up and down so the connecting rods are still connected.
Could a bad sensor cause a loud enough knock so that it sounds like a crank bearing?
 

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Could you have crossed 2 plug wires?Also check your oil to see if it smells like gas,depending on how many times you cycled the key,you may have diluted the oil and spun a rod brg.
 

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Discussion Starter · #10 · (Edited)
Something bad happened I'm afraid. My knock got real bad and I suddenly have a good deal of smoke in the exhaust where there was no smoke before. I drained the oil (since it needed it anyway) and it has no gas smell. Tomorrow I will pop out the plugs and see if I have anything on my new spark plugs which hints to what the problem is.
The knocking sound seems a whole lot like a busted piston skirt, but might could be a blown head gasket that is letting oil into the cylinder and also leaking between the cylinders causing that bad knock. It also backfired a couple of times again just before it started smoking (maybe that just made a bad head gasket worse). By the way the smoke definitely has that oil smell to it. I will post what I find tomorrow. As always thanks for the replies.
 

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Compression tester will tell you if you have a problem in a cylinder..
 

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Discussion Starter · #12 · (Edited)
UPDATE:

I have about 110 lbs compression on #1,2,3 #4 is 0 lbs.
Almost certainly dropped the seat, also damaged my plug in #4. Hopefully there is no piston damage and I can fix this it from the top side. Digging into it a little before I go to work.
 

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Ouch! I hope you can fix it without having to pull the engine.
 

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Discussion Starter · #14 ·
It's got to come out. Master rebuild kit plus machining ~$800

That's not too bad as far as I am concerned since the rest of the car inside and out is in excellent shape.
 
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