2001 gt won't turn over after some work

hotcobra03 · Mar 29, 2009

hard to start

question? is everything hooked up when trying to start,,mine wont start is maf is not hooked up,,,are you sure maf has power to it? and here is stupid question,,when you reset your timing chains you did put copper links at marks and you turned engine over around 8 times to see if your still on before re-installing front cover? your driverside can be on and passenger off by 1 tooth

jomull55 · Mar 29, 2009

GT Tommy said:
The only other thing I can think of, is for you to try removing your catalytic converter to see if you still have to wot for the engine to start, or if the engine runs better by doing that. I remember working on a Toyota with the same symptoms. I tried removing the catalytic converter, and I could not believe it, the engine ran 100 % better. Again, if you decide to do this, check your engine oil first, for unspent fuel. If there is unspent fuel mixed with the engine oil, you will smell it right away. If that is the case, replace the oil and oil filter first, before you attempt to start the engine, in the event that the engine starts up and runs better, you will be glad that you did! Hope this helps. Good luck, Tommy.

i have an o/r x

GT Tommy · Mar 29, 2009

Fuel in your oil!

My concern is with the unspent fuel. With all the attempts of starting the engine, there will be alot of unspent fuel that has to go somewhere, and that somewhere is in the engine oil pan. I cannot begin to tell you how critical this condition is for the life of your engine. The Chevy engine I spoke of in a previous thread was brand new. I had electrical related problems with the fuel system and all of the unspent fuel ended up in the engine oil pan. Every week I was changing my oil and oil filter while troubleshooting my problems because I could smell the fuel in the oil. After about about a month of troubleshooting I finally got the engine to run. By that time, it was too late. The damage to the bearings had already happend. Everytime I would start up the engine, I would hear a knock, and it would get louder and louder as time went on. Needless to say, I had to pull the engine. So, please do check for unspent fuel in your oil. Drain you oil and you will smell it right away if fuel is present. Good luck, Tommy.

Sanco213 · Mar 29, 2009

i had the same problem on an eclipse once... only run at wot (and not run good either) and it car had compression had spark and had fuel... thought it was timing as i had just changed the belt... after multiple times of checking timing and verify that it was right.. it ended up being a bad camshaft sensor.. as i understand it on that vehicle the camshaft sensor set the fuel timing. so it was getting fuel.. just at the wrong time.. now i know a 4.6 is different, but i believe that the camshaft sensor operates on the same principals. also i had checked the sensor to see if it was good and the tests showed it was good.. but in a last effort move i swapped the sensor from a friends car to check and it fired right up... hope it helps!

jomull55 · Mar 30, 2009

after looking at the car again yesterday i'm pretty sure the timing is still off or i bent valves. i bought a compression gauge for 8$ at harbor freight but i could not get it to thread into the spark plug holes well enough. it would just pop out. so im going to tear it back down and check the timing again, if its still on i can assume i have bent valves.

if the valves are bent i guess i will start looking for aftermarket heads/cams. or maybe just wait on trickflow's

Sanco213 · Mar 30, 2009

ummmm.. when you got the car back from the dealership and reset the timing, was the timing off? if soo how much?and well on another note... if you did bend the valves i have a set of stock pi heads for sale...

jomull55 · Mar 30, 2009

Sanco213 said:
ummmm.. when you got the car back from the dealership and reset the timing, was the timing off? if soo how much?and well on another note... if you did bend the valves i have a set of stock pi heads for sale...

timing was off by like 2 teeth as far as i could tell. but it could still be off after i set it because i did not turn the crank 8 times to see if it was still on, pm me with a price for the heads.

squeak93 · Mar 30, 2009

Sanco213 said:
ummmm.. when you got the car back from the dealership and reset the timing, was the timing off? if soo how much?and well on another note... if you did bend the valves i have a set of stock pi heads for sale...

+1. I can't find anywhere that u said the timing was off. Just that u re checked the timing and it was ok. So with that said, if the timing was not off, then you did not bend your valves. I too am leaning towards a bad sensor.

hotcobra03 · Mar 30, 2009

testing/checking

i would get a different compression tester before pulling front cover... dude i was also in the same shoe as you,,,my cobra ate a valve ,and squeak also just got a quick learning....a 4.6 is easier than a lawnmower to get running,,,you did say the car was running ,but timing chain was loose and making noise,, just go for it and change both sensors (crank/cam) its those or something you did,,,, my problem was found with a compression tester,,

mogs01gt · Mar 30, 2009

jomull55 said:
timing was off by like 2 teeth as far as i could tell. but it could still be off after i set it because i did not turn the crank 8 times to see if it was still on, pm me with a price for the heads.

two teeth will not cause PtV issues or starting issues.

jomull55 · Mar 30, 2009

mogs01gt said:
two teeth will not cause PtV issues or starting issues.

well if i tear down again and see if the timing is off... hopefully get this done tonight

squeak93 · Mar 30, 2009

Save urself the trouble and buy the two sensors first. At this point you've wasted so much money that you can justify some more for the sensors. Maybe if u know the parts guys well enough, if they don't fix ur issue u can return them.

GT Tommy · Mar 30, 2009

Bent valves or not?

jomull55 said:
after looking at the car again yesterday i'm pretty sure the timing is still off or i bent valves. i bought a compression gauge for 8$ at harbor freight but i could not get it to thread into the spark plug holes well enough. it would just pop out. so im going to tear it back down and check the timing again, if its still on i can assume i have bent valves.

if the valves are bent i guess i will start looking for aftermarket heads/cams. or maybe just wait on trickflow's

If this was my engine, I would take the compression tester back for one that will work right for you. No matter what you do at this point, you can save yourself alot of work by getting the compression check done. Once you are satisfied that your timing is set right, get the compression test done. This will tell you if you have to remove the heads or not! Good luck, Tommy.

jomull55 · Mar 31, 2009

mogs01gt · Mar 31, 2009

Well there's your problem right there . I posted on BS for ya.

jomull55 · Mar 31, 2009

mogs01gt said:
Well there's your problem right there . I posted on BS for ya.

lambypoo · Mar 31, 2009

Nothing a little JB Weld can't fix Trippy all four broke.

Sanco213 · Mar 31, 2009

i guess the timeing was off more then you expected??? i wonder how the heads are...

squeak93 · Mar 31, 2009

I can't see the pics..... did the valves break or what?

jomull55 · Mar 31, 2009

squeak93 said:
I can't see the pics..... did the valves break or what?

cam followers broke. valves are probably bent also.

most likely i will be removing head(s) and taking them to a machine shop to be repaired. also might look into getting them ported a bit. im not sure yet. i plan to go chat with the machine shop when i get off work today.

2001 gt won't turn over after some work

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