hey guys i recently (well my bro and i) swapped in a ls/vtec in my 97 cx hatch, im using the stock harness (vtec will be wired seperately) i converted the obd1 injectors, alt, dizzy to obd2, i have a obd2 to obd1 jumper with a chipped p28, before we installed the motor we installed ctr cams, we did a valve adj. 0008 exhaust and 0007 intake, we started the car, it started fine, idles ok, but when trying to press the gas the motor bogs out, when we slowly open the throttle body it revs but never passes like 4 or 5k,

couple things that im thinking it could be....there is no alternator belt right now because im trying to look for the pin that holds the crank pulley to the block but it should still run right? with a good battery? and the vtec pressure switch, vtec solenoid and knock sensor arent hooked up yet...is this the cause?...please help im trying to get my car finaly up and running...any info will greatly be appreciated

 

when you say you are trying to find the pin that holds the crank pulley to the block, do you mean the woodruff key that goes between the crank snout and the slot in the pulley? I could see that being a huge issue at high rpms.

the motor may fire up on a good battery without an alternator but it won't last too long.

if you insist on running without the vtec components hooked up, and this is just a thought, perhaps you can raise the vtec engagement point on your ecu so the computer isn't looking for those components, which MIGHT allow you to rev higher...however if you are missing the woodruff key, that probably has a lot to do with your rev issue. i would just leave the car parked until you can put everything back together properly. good luck with your build bro! keep us posted.

 

yes its the woodruff key, sounds familiar... i noticed when i took off the crank pulley while i was installing the cams that there wasnt a woodruff key and the teeths on the pulley were wasted.

thanks alot for the feedback, i will put everything back together and see how that goes

 

Tune.

 

well heres an update in what went wrong....i had the 2 sensors on the tb mixed up, and i was bummed out for hours trying to figure out why the hell it wouldnt pass 4k...well heres why....i completely forgot the ecu has a 2 step..lol...

car runs pretty good now, might adjust the valves tomorrow, i did it when the motor was warm but not hot,..so it has some ticking noise,,...heres a picture of the end result, incase anyone gives a dooky

thanks everyone for your support


By jdmpire at 2010-11-25

 

Nice to see people posting up the solution as well as the problems, good luck getting the rest sorted out.

 

TUNE IT those cams want more air/fuel....which means more power.

 

I had almost the same problem as you. I built my B20VTEC, started it and idled great. Then after reving it, it started to cut out/miss around 4k. I told my tuner NOT put to step on it and me thinking it was a miss stopped reving it and continued trouble shooting. Little did I know he added 2 step onto my base map.

 

some brain farts can be frustrating and funny at the end, i remember this time i was checking the fuses with the fuse tester (ice pick) and i was checking and wondering why in the jimmy eat world there wasn't any power going to the fuses, and i was checking them with a screwdriver lol

as far as a tune im waiting till i piece everything together so it can be ready, im aiming for 170whp, what im waiting for; 310cc injectors, any good header i can find with a 2.5 inch collector, P30 pistons, 65mm+ TB....