BIG engine Trouble I Think 97 3.1 Lumi... HELP!!!

Ok.... a few days ago she started to run a lil rough..but only for a short time then cleared up and the (SES) light came on so over to autozone... P0305 Misfire on #5 Cyl... So I figure Plugs this weekend... NEVER GOT THAT FAR!!!:banghead: I started her up this morning.. started good and the (SES) light had gone off so it reset... well 20 minutes into driving... all of a sudden she starts to lose power and the (SES) came on Again also the OIL light popped on and she started the Misfire chug again... stopped her and turned her off for a few minutes... I restarted her and the same MISFIRE chug and OIL light... so while I had her runnin' I put her in reverse and back her up a 'lil so the tow truck could get to her easier... and she DIES!!!Mind You THERE WAS NEVER A TICK OR KNOCK DURING THIS WHOLE TRAGEDY!! Well I try to start her again and NO Dice!!! Cranked about a 1/4 turn(like bumpin the engine) but NO further... Towed to a Trusted Shop and they pulled the front plugs and"soaked" the engine to "free it up" and Nothing... says I spun a bearing:uhoh: Well My regular shop said it could be something Called Hydro-Lock... but they couldnt look at it til next week(why I didnt take it there 1st) and Im a Courier who needs his car to Make$$$ So... what do You think People????? I really dont want her to go to the crusher!!! I need Help and Ideas...


Thanx to ALL that Reply!!!


MYX

Oh Also... the was NO contamination In either the OIL or Radiator!!!:banghead: LOL


MYX

Hydrolock is when the cylinders are so full of fluid (fuel, coolant) that the volume in the combustion chamber can't be compressed, so the motor is stuck there and can't turn anymore...I guess if you had an injector go totally insane and fill the cylinder it could do that...but a hydrolock on one cylinder usually leads to a twisted rod or broken wristpin or piston, whatever gives easiest to being wrenched by the other cylinders pushing against it....

I dunno. Be interesting to find out what it is...

so, now the motor turns over? run a compression check. Make sure the oil pump hasn't pumped its last.

Hi, This is the original posts Mrs. If anyone is interested in purchasing the car let us no. We r trying to sell it now or for parts. There is no definate answer for the problem but we know it clicks when u turn the key but it wont turn over at all.

can you crank it over by hand?

The car wont crank by hand or anything and when the auto shop tried it they got metal on metal. The exact words are its not worth fixing the engine. So now with all the newer parts we want some of our money back.

ouch, metel on metel? Did your oil pump quit on you, and cause you to eat up your main and rod bearings? No oil light come on or anything?

T- ... Read the original post carefully... I made It ABUNDANTLY clear that the OIL light was on and that it was still runnin' at that time and there were no KNocks Or Ticks... The shop that looked at her said they hand cranked it and heard metal on metal So shes done... Just partin her out now (Or Whole car as is) so if you or anyone need parts... let me know... ALT is already gone:)


Thanks All,

MYX

im sorry, my bad. UMMMMM, i'll think about that one and get back to you.

Interesting...I only learned the other day how the computer senses misfire, I had always assumed it just sensed the discharge spike in the ground circuit, but I was wrong...it reads the slight crank decelleration through the CPS and notes which cylinder's power cycle occured just before that, and so is able to determine which one misfired....

So I suppose that if you had one dragging on a power stroke due to a bearing getting ready to seize or something, it could also read that bogging as a misfire also...it would be interesting (to me) to pull the bottom apart and see if it was correct as to which one screwed the pooch.

My husband actually wants to take the oil pan of to see which one it was. The misfire read on the number 5 but then cleared the code itself so we were stunned when the engine actually did what it did. Sad thing was when we were driving and lost power to the engine I looked at my husband in the face and said we just lost a cylinder or engine blew. Is it common tho when something like this happens that it feels like the engine looses all the power and when u put the pedal to the floor the engine sounds like its racing like crazy but u literally get no movement from the car? That is what has stumped us. When it happened it felt as if the belt came off but then the car died. If my husband does look today we will post what it was if we see anything. We hate to let the car go tho.

Is it common tho when something like this happens that it feels like the engine looses all the power and when u put the pedal to the floor the engine sounds like its racing like crazy but u literally get no movement from the car? That is what has stumped us.

No...not really, unless it downshifted all the way to L1 and was racing because of that....but yes, you have to feed them more and more throttle as they start to sieze, if you are trying to maintain speed (which you shouldn't if the motor is dying...but I've run a couple into the ground just outta spite like that..)

If he wants to try something as a long shot, he could remove the torque convertor bolts and see if the motor turns free then...a self-destructed lock-up torque convertor that has fragged could keep the motor from turning over, and produce a metal to metal sensation when the crank is rotated...still doen't explain why it was reading a misfire...unless that was a red herring...and normally lock-ups give plenty of indication when they are going bad...

Actually, forget that...just thinking out loud...forgot you had low oil pressure leading up to the seizure...

What happened was we were at a stop light hit the gas car went fine then the oil light came on then the car wouldnt accelerate. We stopped checked the oil. turned car back on started fine backed up about 100 feet turned car off and then would only click from that point on. now its sitting dead in the driveway with no alternator considering it wasnt very old and took it back to store we got it from. But remember a couple days before that the ses light came on and the code for plug 5 or cylinder 5 came up. But that went away. Im sure this is mind boggling just like for us and our mechanics here.