Another No Start Issue...

[draivar]

91 Q sat for about a year and a half. Fuel running thru line after filter. Spark is there. All fuses and relays good. Just changed to a new starter. Any ideas. Temps down here in the 50s past few days. Motor turns but doesn't start. Got about 6 gallons in tank. Help appreciated.

BTW I am looking for a few posts from recently which I couldn't find tonight. They contained some info. from the gurus about things to do after doing a fuel pressure release. Almost sounds as if on a diesel truck when you run it out of fuel. You've got to purge the air out of the fuel lines....HELP!!!

[oldmako]

18 month old gas was ancient last year, and if it contains ethanol it's even worse. I mess with boats quite a bit and the newer fuels have caused significant havoc in boats that see little use. The beauty of a boat is that it's generally easy to rig up a supplemental fuel tank with fresh gas for troubleshooting. I'd suggest that you find a way to get clean fresh fuel to the engine before you tear your hair out chasing symptoms.

[Woot!]

MAF? Are all vacuum lines in tact?

[Woot!]

18 month old gas was ancient last year, and if it contains ethanol in it it is even worse. I mess with boats quite a bit and the newer fuels have caused significant havoc in boats that see little use. The beauty of a boat is that it's generally easy to rig up a supplemental fuel tank with fresh gas for troubleshooting. I'd suggest that you find a way to get clean fresh fuel to the engine before you tear your hair out chasing symptoms.

You could at least fill it full of new fuel.

[draivar]

I tried to start it again after letting it sit for a few hours...same issue I can hear it almost trying to start but no luck. It was sitting on jackstands so i let it sit now on level ground...I added fuel into it about 5 gals. or so...I mean this should be enough to fire the car up at least. Tomorrow morning would probably be a cleanup of the MAF and its connector even though it is on pretty tight and doesn't wiggle. Also a new fuel filter which I got from Joe sitting here brand new would be put on. No humming from the FPCU other than the normal 5 sec. hum when ignition turned on. Fuel gauge registers dead on @ a 1/4 mark.

I don't think however that a faulty/dirty MAF wouldn't allow the car to start at all. I would be happy if the car at least starts and then sputters and coughs. At least I can troubleshoot from there.....

[draivar]

Does anyone here think the 2 blue TCS relays under battery tray might have something to do with this no start situation? I've got them both taken out right now and the connectors simply dangling...another issue I need to troubleshoot when the car eventually fires up.

[draivar]

stumped on ideas eh folks?? well today I tried again with strictly WOT and no luck. I read some threads and with Mike's advice tried to bypass the FPCU and same issue; car trying to start but is not firing up. I then popped the oil cap and smelled fuel so I took the p/s ornament cover off and took #2, 4, and 6 plugs out. No fouled plugs but just a tad bit of oil on the #2 plug. Cleaned everything back up and added some oil 15W40 into the 3 holes. Left it there for an hour and tried to fire up the car. This time the dreaded clunk came and the motor seems to be locked. I tried turning the crank pulley and it is very hard.

I am trying to put some oil back on the rings to build some compression. Thought this might do the trick but this motor and vehicle stumps me. I will leave until tomorrow and then try again. If this issue persists any longer, I'll be going the cccpman route in selling her.

[maxnix]

91 Q sat for about a year and a half. Fuel running thru line after filter. Got about 6 gallons in tank. Help appreciated.

Can you say condensation? What is the fuel pressure?

Are you trying to hydorlock it?

Try some ISO-HEET.

[elwesso]

Take all the spark plugs out and see if its hydrolocked... DO NOT MESS WITH IT ANYMORE OR YOU WILL NOT BE STARTING THE MOTOR AGAIN.

Verify its a hydrolock. Not sure why you dumped oil down the spark plug holes, sounds like recipe for hydrolock for sure..

I was thinking that the fuel was giving inadequate pressure. I have to think that the car would at least start with old gas, my BMW started right up with 3 year old gas, that thing is ancient.

If you want to rule out the MAF unplug it. the car will idle with the MAF not hooked up.

I woudl check fuel pressure.. Get a GAUGE!!!! When the pump primes make sure its about 40PSI (42 is the magic number)... Then when its done priming make sure it holds pressure.

MAN i wish had the time and space to pick up all these nice Qs for nothing when people cant figure out problems on them.

[draivar]

Not purposely trying to hydrolock...Since when did oil start hydrolocking motors? The rings had gotten dry as hell...An old trick was to squirt oil down the spark plug holes....Maybe should have used WD40

[elwesso]

Another thought is maybe your guides are toast? Maybe you skipped a tooth causing a no compression situation and now you skipped another one and your getting valve/piston paddycake?

[RAP]

" 91 Q sat for about a year and a half. Fuel running thru line after filter"

I haven't read that you actually checked if fuel is being injected/sprayed into the combustion chambers?

Are the injectors clicking at least? Easy enough to check with a stethoscope or even a long screwdriver held against your ear.

You can also remove an injector and actually see fuel being sprayed through them as the starter/engine is turning?

But then you being the owner of a "Trucking company" bespeaks some knowledge of mechanics, so...

Disclaimer: I haven't actually worked on these Q 45 cars (recently acquired one) but they shouldn't be any different than others.

Good luck. Jack

[draivar]

Another thought is maybe your guides are toast? Maybe you skipped a tooth causing a no compression situation and now you skipped another one and your getting valve/piston paddycake?

Hey Wes the guides have been done on this car. I got the chance finally today to take all the plugs out. DId that and tried to turn crank pulley and it turned. Tried starting the motor and it spewed the dumped oil out and started turning. I have left it @ that. What do you think should be the next move from my side?

Cylinders 1,3,5,2,6,8 all had oil on the bottom of the plugs and turned out they weren't even the right plugs. Major carbon buildup on top of the pistons as well. No valve/piston paddycake though. After further drying out of the spark plug holes, I am thinking new plugs as well as testing each individual coil for spark. Can that be done one cylinder at a time or gotta have everything connected??? Please help me out! Thanks

Update: Did a compression test on cylinders...Results:1= 2102= 2103= 2074= 2155= 110 (low)6= 2007= 55 (very low)8= 210
Modified by draivar at 7:16 PM 1/2/2008