can somebody please help on this problem on my 1999 tl. tcs light and check engine are on and the steering wheel vibrates so much when im driving. i'm able to read the codes and it says p0300,p0301, p0302, p0303, p0304, p0305, p0306 and pending on p1399. do i need a specialist for this problem or i may be able to do it myself?

 

Thats a random multiple misfire code.

First thing i need to ask you is when was the last time the spark plugs were changed??

2nd, this code usually results in there being 1 or 2 coilpacks that are in need of replacement.

 

spark plugs were changed in oct '07 when the timing belt was replaced. also, egr valve was supposed to be cleaned

 

was the intake manifold removed for the proper EGR port cleaning?- that affects idle mostly

SO you have recent spark plugs- do you know what brand they used?
The TL likes NGK or Denso ONLY

The next item would be a failed coil as fsttmys said. You buy 1 and try it on each cylinder in turn until the car runs better!

 

ngk spark plugs were used. i dont know if manifold was removed but i would think so. do you know if one coil is good for any cylinder? thanks again on all your tips...

 

yes its the same coil-
to properly clean the EGR ports you must remove the manifold
ask the tech

 

can the timing belt be changed without removing the manifold? my mechanic assured me that he cleaned the egr valve..

 

the VALVE is a part that bolts to the manifold
removing and spraying cleaner into it will not do the same as cleaning the passages thjat get all carboned up and plugged
See the DIY on Thermoblock install/EGR cleaning for details
No you dont have to remove manifold to change belt

 

Yes the timing belt can be changed without removing the manifold

Your problem is most likely a coil pack. Pick up one and start out on what ever end of the motor you would like to. Take the on on the car off, replace it with the new one. On the drivers side of the dash is the fuse panel, remove the clock backup fuse for a min and replace it. After doing that you have reset the ECU. take the car for a spin and see if the CEL comes back on. If it does, repeat that same procedure with the next coil. Do that over and over till the light doesnt come on. Most people have found its just 1 coil causing the problem. Spend a hr or so trouble shooting yourself and save some money

 

ok i'll try that thank very much...

 

i bought a new coil and after trying it one at a time, on the third cylinder the vibrations and the tcs light are gone. it runs smoothly just like before. the cel is also gone after erasing the codes with the scanner. now my next project is seafoming the vacuum system. i saved lots of dough aafter doing everything you've suggested. acura deaaler quoted of me about $800 to fix this problem.. again thank you so much!!!!!

 

800 dollars=figures! STEALERSHIPS are everywhere. they probabaly would have slapped on a new coil and then KA CHING~! $800.00 please.

 

yeah$77.65 for a coil and 45 minutes of fun of replacing an old coil from one cylinder and putting the new one on till i found the defective one on the third try. i was told that it's highly recommended that i replace all six coils....bastards!!!! hope more and more will use this forum to force these dealers to lower their rates...

 

Glad it worked out for you and you solved the problem...