**********UPDATED INFO AT THE BOTTOM!**************

STILL BROKEN!


Okay, well the car has been idling rough lately. About 500 rpm. It only does it on occasion, and only when I come to a stop. Well over the last 3 days the car has actually cut off 3 times completely. I can start it back up no problem.

Well, today the car cut off and wouldn't crank back up. My buddy jumped me off and we barely got home. The battery is almost brand new. I thought - ALTERNATOR. Simple, easy to fix, but I was running 14v according to my Volt guage on the way home.

Well, the car also sounded bad, I couldn't isolate the sound... maybe knock... Well we let the car cool at my buddys, then we went out to check the oil. The oil was fine. The car cranked right up, and idled fine. But it sounds like I am getting some valve tap from the drivers side bank. I didn't take it anywhere, just started it, and let it idle.

I think the low idle from before was caused by a crack in the intake elbow, of which I ordered a new one last night, and these other problems are non-related. I dont really know what I am asking for specifically, just help!!

How can I stop valve tap?

 

Okay, it isnt the battery its basically brand new. I replaced the opti about 15-20k ago. Plugs and wires have less than 5k on them. I bought a fuel filter and injector cleaner just now, we will see how that works...

Please... anyone else help?

 

Mine did the same thing before and it was my elbow, which was torn where it fit over the TB. Hopefully thats it, but to me it sounds vacuum related. Good Luck!

 

The tapping could be arcing from the wires or plugs. Inspect at night for visible flashes.

Also, exhaust manifold bolts could be loose causing a ticking sound (exhaust leak) although that shouldn't cause the car to stop.

Any trouble codes?

 

No codes. Filter and injector cleaner did nothing.

And in the process I got gasoline in my ear and it is burning like a mother ****er.

I hope the elbow will fix the problems. But at this rate. I doubt it.

 

Since you are looking for suggestions. Some relatively cheap things to try are pull the MAP sensor and clean it. Also, pull your IAC sensor and clean it. When I would start my car first thing in the morning, it would idle high then low then high then low until it warmed up. Cleaning the IAC fixed my problem.

 

Is the IAC the same thing as an IAT?

If not, where is it located?

 

IAC is on the bottom of the TB, there is a connector you can use to locate it, its the bottom passenger side harness that goes to the TB, it plugs into the IAC.. Its kinda hard to get it off without taking the TB off.. I would get some TB cleaner and some new gaskets and redo the whole thing.. check inside for oil deposites (inside the manifold).. The vent for the crank case (passenger side valve cover that goes to TB) may be leaking into the TB they do that, which will lower your cars performance.. if there is enough it may cause it to stall i suppose.. are you blowing any smoke out of the exhaust? Are all your plugs tight? are the little end caps on the Spark Plugs all tight? Check all your vacume connections, there is one underneath the crank case vent on the TB, that would make the car idle funny and possibly die.. lot of simple things to check.. umm.. I cant really think of anything else.. what exactly is your car doing?

 

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Bookmark this page. It will come in handy more than once.

 

Okay, let me ask this. The throttle body has alot of oil deposits in it. Is it safe to cap off the lines that run from the crank and valve-cover to the throttle body with some breathers?

I am going to try to clean the MAP (was dirty), throttle body, and cap off those lines and see how it does...

 

Yes... Put a vacume cap on the TB and put a breather where the hose was coming out.. DO NOT put a breather where the oil filler neck was.. You can but thats not what im talking about.. Thats why there are oil deposites in there.. Get some TB cleaner and spray inside the manifold and TB.. If there is alot of oil in there chances are your IAC is soaked as well, take the TB of and cleaning everything would be your best bet.. I think it took me about 10 minutes to take that thing off. there are the four bolts that hold it on and then its like a brake cable... and you have to take that black protector off.. Just try it and youll know what to do if you have any common sense.. lol.


EDIT::: You said LINES, no! Its one line, the other one you need.. Just cap off the top one not the one under it, that wouldnt be good.. lol

 

Okay, here is an update...

Replaced the PCV Valve per my mechanics recommendation. Cleaned the MAP, IAC, and TB. Car was still running the same. It felt like it had about 100 less HP. I had to go to class, so my buddy was going to take it to Midas for me to get a spot rewelded on the exhaust.

I get out of class, and my buddy picks me up telling me that my car is on the side of the road.

Now the situation is:

Car has good battery but wont crank. Car wont crank from being jumped off or being boosted. Even put in a brand new battery and nothing. The car will only turn over a couple of times when being jumped off. I wasnt there with the new battery, but it didnt crank either. Connections were replaced to the batt.

It would be easy to guess "starter" but what would cause the car to cut off? There is a much bigger problem here. Anyone else have any ideas?

The guy who put in the batt said that it could be a seized motor. But LT1s are pretty solid, I keep mine maintained, and run no N20 or FI. Also, the car wouldn't turn over at all if it was seized, right?

Well... PLEASE HELP ME!

 

Right if the motor was seized it cwouldnt crank at all. I would double check your connections, and check the motor grounds on the drivers side front. also the one on the pass side just below the head about mid way down the motor.

When I put my motor in my 93 about 8 years ago I didnt tighten the groundwire on the pass side of theblock and it behaved just like youre describing starting wise.

the tapping may be a weak lifter , loose rocker, noisy injector or arching plug wire, one good way to check the wires is get a spray bottle and put water in it, now at night while running, spray the plug wires and around the plugs with the light water mist, will really light things up if a wire is even partially open.

I would adjust the rockers on that side to see how the tap responds. Also your injector cleaning and fuel filter change may have taken care of the low rpm/idle problem.

 

If its siezed it wouldnt crank somtimes and not others. I think I'd be looking into the electrical system first since it sounds like a hit and miss problem, there sometimes, not others.

As far as it running like crap, check for good spark. How many miles on the Opti??? Did you have to replace the waterpump recently? If the Opti gets water in it, its junk.

Just a few suggestions for ya until someone who really knows LT1's chimes in.

 

My thoughts lay towards an Opti.. Check all your plug wires and make sure they are fastened tightly.. Stick your head underneath your car and look at the bottom of the water pump.. There is a tiny hole at the bottom, if its leaking or has some corrosion around it I would definatly suspect the opti.. If it doesnt have a leak then it might be another problem, still may be your opti though.. Was it hesitating at all? Bad gas mileage? Do you have a catalytic converter on your car? It might also be clogged. Did you have any engine work or do anything to your car before this happened? Did this just occur all of a sudden?

EDIT:: Check ALL of your fuses too.. Might be something simple..