I went from a stock block with aem short ram to the build below. I just finished putting everything together and fired it up and I am having some problems.

ERL 2.1L K20 block with 9.0:1 pistons

Supertech Valves, Seats, Seals, Guides, Springs and Rentainers

New guides and chains and hybrid racing tensioner

ERL S2000 Oil pump

Hytech Cam tower mod

Kpro using stock K20 basemap

RBC Intake Manifold

Hybrid Racing 70mm Throttle Body

Stock Cams


So the issues I am having are as follows.

The car warms up fine to an idle bout 900 rpm but it starts to jump around to about 1200 rpm every now and then. I cleaned the IACV twice and it is not the cause.

The real issue is after letting it warm up. I give it some throttle, about 15-20 percent from the TPS sensor and it doesn't come back down the whole way. It stops around 1300 rpm and there is a rattling noise coming from what sounds like the valve cover. It also showed my ignition degree at 30 degrees as it wasn't coming down. The valve cover seems really hot but I remember it being somewhat hot before. The car has been in progress building for the last year with motor out. The car is up on jack stands now until I can figure this out. Any ideas?

 

I just did a rebuild of a K24 in an 03 accord all stock. I had the same problem when I fired it up. I readjusted the valves twice and it helped alot, but I think there is an issue with the timing on mine as well because when I put the car in drive it has terrible acceleration.

 

Are you sure it is timed correctly?


Also with only 9:1 compression on a bored 2.1 you will definitely need a better tune than the k20...


Are you going turbo? Why did you go so low in compression?

 

didn't really have a choice on the compression. Bought a sleeved ERL block and thats what it had. Saved a few thousand in the cost of pistons, rods and machining my block would have need to be sleeved and ready for usage again.

precision 6266 BB turbo

pretty much got the idle worked out. raised it to 900 and pulled some cam angle. then slid the idle duty cycle to the left til it dropped like it was supposed to.

I am still having an intermittent problem where the cam angle does not always follow the camcmd. It only happens when the car is warmed up and it doesn't always happen. I have 20psi of oil at warm idle at the galley and I have replaced the VTC actuator, VTC solenoid, both VTEC and VTC screens, run through the service manual for checking the wiring, replaced all my grounds, rechecked my timing about 10 times, measured oil pressure loss due the possibility of leaking vtec solenoid (no loss there) as well as some other stuff I can't remember.

I am running an ERL turbo block with oil squirters, ERL S2K pump, modified moroso oil pan, hybrid timing chain tensioners, and tractuff cam oil tower mod (they did have a problem with their machine and broke mine and got me another set of cam towers but there was no scoring or out of roundness with the set they sent me. I did not check the clearance at tower one however).

Any other advice.

 

Sounds like a great build. So far you've done all I would say. Raise idle, I'd still go to I 1k and I also had to drop the slider to the left.