CPS sensor fail= Crankwalk?

[lil corb]

This is for my friend who has a 2G.

Symptoms started all of a sudden but his car has always thrown a code for CPS & Cylinder misfire. Whenever he presses the clutch the car stalls and sometimes die. He was having start up issues and we attributed to his plugs being fouled so we replaced them and it started right up but then the clutch issues started. He also has his clutch switch disengaged. From what I gather the start up issue could also be attributed to a bad CPS.

We replaced the CPS yesterday and it started up fine but when he would press the clutch you could hear what it seems like the sensor blade hitting the sensor. It started making a loud high pitch grinding noise. The car did not stall after a couple of shifts but then it started dying again as he would press it in. No codes are being thrown yet. I have pulled on the crank pulley and it has some play to it.

Car is a 96 but has "evo 3" internals and I assumed the block is a 97-99 because of the CPS behind crank. OFH looks in pretty bad shape. Oil leaks all over the place.

But before we can tackle that, is it walking? How feasible is it rebuild the bottom end with stock internals assuming the block is ok? Could he rebuild using the revise washers and bearings with oem parts?

I'm not too knowledgable of 2Gs as I am 1Gs Thanks

 

[DSMTyson]

Well if the crank actually has play in it, then yes. Chances are, it is starting to walk.

 

[Dsm4lyfe12]

Use a caliper to check the end play of his harmonic balancer before you assume that its crankwalk and then get flamed.

 

[lil corb]

Ok I will tell him. When it does run its pretty strong and idles fine. Any input on the rebuild question?

 

[95talongirl]

Yea, check for play before making the assumption. So I take it this engine has been rebuilt already judging from the post. Perhaps the person who did it before messed something up?

If he does have the later 7-bolt block, you'll have to get the later main bearings. The early blocks won't have the machine work in the block to accept the "one-piece" main bearing vs. the washers; for lack of better terms.

 

[lil corb]

Good info. Thanks! i told him we should pull the pan and check for clearances but i think he just wants to rebuild. At what point is the block not re usable? When it moves so much motor seizes?

 

[95talongirl]

If it is, indeed, crankwalking... I'd just get a different short block for it. Then go through and rebuild that one.

 

[lil corb]

Better to be safe than safe sorry. I'll update everyone.

Thanks everyone