[720_datsun]

Originally posted by BeatJunky
[edit: sorry the bible worthy long post]

Offender: 1990 240SX Coupe XE 5-Speed KA24E All Stock
Victim: Me

My car wasnt in the best mechanical shape but it was at least running somewhat reliably about 3 days ago. It would consume about a quart of oil every 2 weeks or so, It ran rich and blew black smoke from exhaust and ticked heavily from valves on and off. To name a few problems.

Anyway, here's my situation. I went to the store to a quart of oil to add and I saw a bottle of ring sealer. I had heard from a friend that the my rings may be worn and this is why it's blowing smoke so I figured I'd try this product. Added the product and the oil and the car was quiter from the ticking and the idle was at about 900 rpm rather than it's usual 1,100 rpm sitting point. That was good IMO. However, it was blowing WHITE/BLUE smoke from exhaust if I revved up to redline.

Drove around fine for a few hours and then all a sudden as I was driving the exhaust pitch got very low and deep, the engine would accelerate sluggishly and the ticking got louder. Not good.

Next day, complete oil change w/filter plus flush. RPM's went back to 1,100 rpms, ticking was same, engine revved easier. Almost like before. When I drove it the car seemed to still be sluggish but it was at the leat 75% better than the day before. So I was calmed a bit.

I knew there was still a problem so I'm thinking I must have damaged the oil pump or something running such viscous oil and the additive.

On the third day, I noticed the valve cover had some minor amount of oil seeping thru perhaps due to the pressure from the days past so I decided to go on and fix that. Got new gasket and I did the job. Car was still the same of course BUT, As I was putting the valve cover back on I kinda put some pressure on the foremost injector with my hand to make clearance to put the screw on and when I touched it, it spit fuel out into the engine bay right onto the intake mani. This made me freak. Finished what I was doing and ran the engine at idle. As it idled, I moved each injector a bit to see what would happen, here are the results:

Frontmost injector: Spit fuel out if touched.
Second towards rear: No effect.
Third towards rear: No effect.
Last at Rear: Makes engine want to stall.

I was told that this could just be the o-ring but Im convinced to replace the 1st and last injectors.

Now today, my car turned on right away after sitting all day with the clicking and acceleration problems going on. Went to the store bought some things came out, car was normal. 5 minutes later stopped at the car wash and it wouldnt start!!!

Ignition seemed fine, Fuel delivery was there cause I could smell the fumes, STRONG, but It wouldnt catch or hold.

Tried to roll start it. Nothing.

I let it sit for 15 minutes after hassling with it and the it barely turned on, I had to hold my foot on the gas pedal so that the car woudlnt start and it ran poorly thereafter. If at a stop I had to hold the pedal down still because if I were to let go and the press the rpms would drop and almost stall the car.

Parked the car for an hour or so, started right up, ran fine like before, ticking and a little rough.

Anyone have any ideas/suggestion.

I appreciate the help...

-Omar

i have semi the same problem with my truck. hard as **** to get started, revs really really slow, i have to be on the gas other rpms drop almost to stall. i can fill the parking lot with white/blue smoke in a minute. i was told it was my rings and vavle seal. aka about $500. my second cylinder get filled with oil.