Phillip J

Wassup Hondatech, So i'm having a bit of a issue here, a friend of mine has done a engine swap onto my car putting a JDM B16A2 in, The problem that i am having though is the car is not engaging VTEC at all not even at 5,500 RPM I tried going a bit higher around 7 7.5 but no sign of it.
Was wondering if anyone has had this issue before and what the main causes would be.

Also that my car aswell is Misfiring when it drives but fine in idle!

Any information regarding this would help alot thankyou!

Krauthammer

if you're misfiring I wouldn't rev it high.... either way I think there is a safety feture in place NOT to engage the VTEC if there is a misfire. you can also check the screen on the seal for the solenoid, could be gunked up. also, you didn't say if the car had a vtec engine before the swap, if it didn't, what are you using as a vtec controller?

09chaplak

As Ron would say, let's address the misfire first. Post codes

2x0

What ecu are you using?

tony_2018

Whose Ron?

K20.ek

What engine code you throwing?

Phillip J

I'm having a code 3 for Map sensor and i dont have one on, and apparently my mate was sayign that JDM B16A2s dont have one.. and im using a aftermarket ECU that is also apparently a spoon ecu

2x0

mk378

With friends like that....

The ECU uses a Pressure-Density fuel mixture control scheme. A MAP sensor is essential to this scheme.
If it is a chipped ECU you need to look at the documentation for the chip and the tune.

Phillip J

Yeah man He fucked me over big time, apologies for the language if it isnt allowed here, Did you have snapchat, cause i can snapchat you videos of whats happening with my car being a bit more descriptive

Thanks heaps !

K20.ek

Put a map sensor in. It needs one to read air/fuel mixture.

Just because its a spoon ecu, it doesnt make it the best setup for your motor. Get one that’ll work for a jdm b16 so you can drive to your tuner and Get it tuned to your exact setup.

K20.ek

are you sure it’s JDM or USDM???

2x0

There's no such thing as a JDM B16A2

BiggieBert

you should never allow them near your car again. Clearly have no idea how to work on honda. And earlier B16a’s have a firewall mounted map sensor. Taht may be where rhe confusion is coming from.

tony_2018

facepalm 100x.

Phillip J

I have photos of the engine bay i took earlier today guys if that also helps.

Phillip J

This is a better look at my engine bay!! Sorry i couldnt attach any photos for some reason.

Phillip J

I have photos but waiting to be approved by Admin! Thanks guys.

2x0

Looks like a USDM B16A2 engine, but the intake manifold must be from a JDM B16A SIR-II which takes the remote MAP sensor. The vacuum port coming off the top of the throttle body should connect to it.

BiggieBert

The rubber hose coming off the TB sitting on the intake tube MUST be connected to a map sensor, you will have to find a way to mount it or find the fuel filter/map sensor bracket (they go together) i can post a pic of mine if you need, or u can zip tie a map to something to secure. Second, i would remove the red cap on the black tube and put a little filter on it since it can’t reach the intake tube, this part is designed to draw fresh air into the engine.

BiggieBert

JDM manifolds don’t have the purge stuff, his does. Unless he added it.