Hey guys. I recently bought and installed the BHR ignition kit. I can tell a big difference with the kit, so I'm pleased with it. The only problem I see is right when I let off the gas (typically to push the clutch in to roll to a stop) the RPM's drop to 500 or so. Happens when I let the clutch in at a stop, or off the gas when moving. I've searched and found nothing conclusive. I did though check a few things here and there that other threads recommended.

There is no chance of improper installation. I checked things multiple times. Unless the wires themselves are specific to a certain spark plug and coil, I don't see that being a problem.

I checked the MAF, reset the battery (for the heck of it), checked for loose or unplugged wires or hoses, etc.

Is there anything I might have forgotten to plug in, reconnect? Any help would be appreciated.

 

if you disconnected the battery it will take a few drive cycles for your car to re learn fuel trims. it might stall at stops, get it warmed up and redline. repeat

 

This problem was before the battery disconnection. I gave the car a test crank last night after I installed it, and after it warmed up, I revved it, and every time it would start to decelerate it would drop to 500, then idle correctly.

 

idk 20 brake stomp? pm bhr?

 

Do a 20 stomp brake pedal reset, then drive NORMALLY for two full drive cycles. No WOT, no mega heavy acceleration, no revving it in nuetral, just drive normal. A full drive cycle is starting from cold, driving till it reaches operating temperature, then shutting it off and letting it sit till it is completely cold again (overnight) then doing that one more time. Then the fuel trims will be set appropriately and your problem should go away.

 

I wouldn't put so much emphasis on "normally"

Because "normal" for me is lots of WOT time. I'd rather have my fuel trims learned based on my actual driving rather than something else.




But if you have an issue after doing an install with one of BHR's products, give Ray a call, email, or PM. Fantastic customer service and he will be able to identify the issue.

 

I will try the 20 brake pedal stomp, and I emailed BHR. Thanks for the help so far guys.

One random thing though, related to this situation somewhat. When I pulled out the airbox, there was a random rubber ring on the tray underneath the box. It's about 1/8 of an inch thick, and you can see how big it is from the picture. Did this fall off anything important? I know it's vague and hard to tell, but I just didn't know if it was something that might have fallen off something important, or it's just a support for the airbox.

For assistance, I removed the airbox and accordion tube between the box and throttle body.

 

That almost looks like the sealing ring for the oil cap. No air box related items looking similar that I can recall.

 

Oil cap ring. Thanks.

 

You probably had a vacuum leak from missing that, which could be causing part of your idle problem.

 

+1 Just bought a BHR Flywheel and MS Exedy clutch from them... good stuff man

 

Well, the RPM drop has resolved itself, and the kit has made a huge difference. Unfortunately, a problem I was hoping to get rid of, is still here. The car shutters quite alot. It wasn't too bad before the kit, but now, it's atleast every 5 seconds. I'm thinking spark plugs. Any other opinions?

Where's a good place to get the NGK OE plugs online for cheap? These plugs are much more than I was expecting.

 

rattle issue could be dirty:
MAF sensor
air filter
eccentric shaft position sensor
bad motor mounts
etc

 

Vacuum leak.

 

Yes OD, it can. There is a vacuum line running to the oil filler neck right under the cap, and I imagine that without the oil cap o-ring the cap can't create a sufficient seal against the neck and produces a vacuum leak.

 

Unless you deliberately place the crankcase under vacuum (some of us do), that line will not create a vacuum leak if it is left off.

 

Really?

I can hear the engine idle note/revs change when I pull off the oil cap while the engine is running, and the line is post MAF...

 

There is no vacuum between the throttle and the air filter.

 

But there is air flow between the filter and throttle, which is sensed by the MAF. If the oil cap is off, wouldn't air be drawn through the breather into the intake tube, downstream from the MAF, and not be sensed?

 

Yes.