420A 95 Eclipse RS won't start

[Samz-salvage]

I have a problem, I have a 95 Mitsubishi Eclipse RS, 420a, it's getting fuel and its firing, but won't crank, and it's in time, all timing marks line up perfectly, what could be the problem?, Any help would be greatly appreciated.... Thank You

 

[1990TSIAWDTALON]

Check the signal wire on the starter. It could be loose or has fallen off if it won't crank over. Also check the starter ground wire for continuity to the battery. The other cause for a no crank is the ignition switch itself.

 

[Samz-salvage]

It spins over just fine, it's firing and getting fuel, but won't crank...

 

[dwb]

It spins over just fine, it's firing and getting fuel, but won't crank...

What kind of oxymoron is this? To crank and spin (turn) over are two different ways to say the same thing.

Might be helpful to post a video.

 

[1990TSIAWDTALON]

You need Fuel, Air and Spark to produce power. You are missing one.
Compression Good?

 

[Samz-salvage]

110 lbs per cylinder, I'm just about ready to put this thing in the boneyard, I'm tired of spending money on something that keeps tearing up....

 

[1990TSIAWDTALON]

Without anymore info on this vehicle and its behavior, it would be hard to be helpful for any of us.
@BLACK'98DSM, is there anything that I am missing that you can be of more help with?

 

[Samz-salvage]

IT WONT START, GETING FUEL AND SPARK, STILL WONT START

It ran fine until this past Thursday, got in it to go somewhere and it kind of had a small backfire through the intake, that's it, it cranks over just fine, just won't start. New sparkplug are sparking good and has good fuel pressure

 

[pauleyman]

Check mechanical timing. make sure it didn't jump time.

 

[jesse12345]

Make sure the plug wires are in the right order it's kind of hard to mess up but I've been there.

 

[BLACK'98DSM]

If memory serves me well, the technical "service limit" for a 420a is 120psi compression. Your measurement of 110 is much too low, regardless. I would think you could still start it though. It would be hard to start, some misfire, lack power and probably blow the dipstick out. Try spraying some starting fluid past the throttle plate and see if she comes alive again. I've found that to be helpful for starting engines with low compression.

Healthy compression for a freshly rebuilt 420a is 225-250psi depending on ring gaps and various clearances. So the bottom line is you need to rebuild your engine. You may be able to band-aid the problem temporarily with a product like Engine Restorer, which will slightly fill scratches in the cylinder walls to boost compression and reduce smoke. I'd imagine with this amount of wear, no band-aiding will make it start easily and run smooth.

I suppose "band aid" is the wrong term to use here. Band-aids are typically used on wounds that heal themselves. Your engine problem will only continue to worsen.

 

[97egl]

If it ran fine with no smoke and idled smooth and this issue came out of nowhere it has to be timing belt related. 110 PSI is way low and generally worn rings do not happen evenly across the cylinders. A jumped timing belt would make the cylinders drop compression pretty evenly. I'd check the timing belt before cranking the engine anymore. At 110 psi you probably don't have any bent valves yet.