i need help. i swapped in a b16a into my 99 ls. apparently vtec is not working causing my car to redline at 6k rpms. this is the 2nd vtec engine in this chassis. i had a 94 b18c1 running obd2 p72 ecu & everything worked fine. well due to throwing a rod & me losing my job, i'm stuck using my cousins b16a block.
since the first swap i've been using my stock ls harness & rewired vtec sel., vt pr sw., & ks. wires to correct ecu. now i have a built b16 head & stock block, running with a p73 ecu now. well i had the p73 ecu on the b18c as well which worked fine.

make a long story short. after swap was done, i test drove car. the engine went all the way to 8400 rpm with p73 ecu, but no vtec. so i swapped to p72 ecu & it ran worst, not that bad though. still no vtec. then i checked my custom vtec wiring to confirm good contact & double check correct pin location on ecu, & now engine seems to be running in blimp mode. could i possibly have a bad vtec selenioid.

if anyone can help me out, i would greatly appreciate it!

 

did you check your oil level?

 

If it's throwing a code for the VTEC system, it's probably going to be one of those components. Although low oil is usually the cause.

 

Change oil and try cleaning VTEC solenoid.

 

oil level is good.

 

any other ideas?