Engine help! Please!

[1MadSHO95]

I have a '93 mtx. I just put one one of my spare engines into this car.
I have a dilemma. Before starting the car to prevent dry start I unplugged the coil and crank the car for about 3 mins with fresh oil in it. I plugged in the coil and started the car. Did not want to start. Ran compression test. All cylinders low. Performed wet compression test. Compression came up on all cylinders, but not to my liking. Used royal purple engine break in oil for the wet test. I do not want to have to pull this engine out again because this engine ran before I stored it.

Any help or advice is much appreciated. Please PM me or email me [email protected].



:rainshit:

 

[rubydist]

My experience is that if these engines sit for any length of time, or if the previous owners didn't change the oil as regularly as they should have, the rings will be stuck. This will result in low compression when cold, and depending on how bad it is possibly ok or low compression when warm. Often, one will also hear piston slap when cold if the rings are stuck.

Since you mentioned that you had stored the engine, I expect that you have stuck rings. Depending on how bad this is, you may get them loosened adequately if you put some AutoRx in the oil and drive it for a while (follow their instructions to the T). If you do this, make especially sure that you have the engine warm before running it hard, or you will scuff pistons and/or cylinder walls. If its too bad for the AutoRx to clear up, then it will need to have the pistons pulled and the rings removed, ring grooves cleaned, and reassembled.

 

[sdpatt]

You cranked for 3 minutes with fuel injecting and no spark. The cylinders got washed and filled with gas. Pull a plug and check for liquid fuel. Also check for spark, but not near the open cylinder.

 

[1MadSHO95]

Engine help please!

I had the inertia switch tripped so the fuel pump was not cycling.

I could not find AutoRX at my local parts store. I did find Seafoam. I removed the spark plugs. Added a little to each cylinder. It seems to be working. I can tell a difference when cranking it. I tried it a couple of times. Before i quit for the evening, i added some more Seafoam and let it sit. I will try again tomorrow or later on today since i noticed it is after midnight. :banghd:

Any other help or advice is greatly appreciated!!

 

[sho_ted]

Auto RX is not in stores only avaliable from their website

 

[elarm1]

I don't trust anything in a bottle anymore (AUTORX)! I tried everything to bring my compression back up but ultimatly changed the rings. Save yourself the headaches, rebuild the motor

 

[tdoughboy37]

After "just" installing the engine, I think pulling and rebuilding would be a headache. I would try the "bottle" and if nothing works he can still pull the engine and rebuild.

 

[elarm1]

My experience is that if these engines sit for any length of time, or if the previous owners didn't change the oil as regularly as they should have, the rings will be stuck. This will result in low compression when cold, and depending on how bad it is possibly ok or low compression when warm. Often, one will also hear piston slap when cold if the rings are stuck.

Since you mentioned that you had stored the engine, I expect that you have stuck rings. Depending on how bad this is, you may get them loosened adequately if you put some AutoRx in the oil and drive it for a while (follow their instructions to the T). If you do this, make especially sure that you have the engine warm before running it hard, or you will scuff pistons and/or cylinder walls. If its too bad for the AutoRx to clear up, then it will need to have the pistons pulled and the rings removed, ring grooves cleaned, and reassembled.

In my case I could keep oil for more than a weeks time before putting another two quarts in it. You can try Autorx but I think yo well be :deadhorse:

 

[rubydist]

AutoRx saved one that used a quart in a couple hundred miles when I first put it in. Then again, there are no guarantees. But, imho, its worth a $20 test before all the work of pulling and rebuilding an engine.