i have a d16z6 motor, i just replaced the tranny and the check engine light came on 2 days after the tranny was installed but when i turned the car off and back on it went away and never came back, but vtec is not working i believe, it gets extremely loud at 5000 rpms but it wont go anywhere and seems as if the car is bogging all the time, every once in awhile i will redline first and it will kick back in for a little bit but always cuts back out within a few minutes or so, what could be the problem here, and is here any way to check old engine light codes, are they saved on the computer?

 

check your oil level first, then your vtec solenoid screen for clogs.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IHateJDM &raquo;</TD></TR><TR><TD CLASS="quote">check your oil level first, then your vtec solenoid screen for clogs. </TD></TR></TABLE>

Exactly. Fromt my experiance, it's usually the oil level that causes it not to work.

 

You said you changed the tranny? Check the VSS ( Vehicle Speed Sensor).

 

ill put the one from my old tranny in it and see if that works, where are the screens at, insode the solenoid? oil level is fine

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by antney &raquo;</TD></TR><TR><TD CLASS="quote">where are the screens at, insode the solenoid? </TD></TR></TABLE>

yep. the vss was my next question too. after that, i would check the pressure switch ground to make sure its good.

 

i switched the vehicle speed sensor out, cleaned vtec soleniod screen wasnt even dirty, oil level is good, did coolant pressure test and the pressure dropped but extremely slow, so im assuming head gasket or craked head could be the issue, would that cause vtec to cut out, anyone have any tips to find out a forsure before i tear it down?

 

ok today it was running extremely slow like bogging down, and it wasnt runnin hot, but i could barely keep up with traffic on the highway, then it backfired and shot out a huge puff of smoke, probably white smoke not sure, then it ran fine the rest of the way to work, i have no clue whats goi on here