Need help with JRSC Prelude SH

**Muckman** · April 23rd, 2004, 11:40 PM

Installed a JRSC kit on a friends 01 Prelude SH. Using all the Jackson Racing components and nothing else. This includes the JR FMU and EMS (Boost and Timing Controller. The car drives fine cruising (light throttle, vacuum) and idles fine. But hard throttle and the car bucks, hesitates, has no power and sounds likes it wants to blow up. Cant get past 0psi manifold pressure cant even get into VTEC unless you keep the throttle angle real low. Basically high load on the engine is what kills it.

Having double checked the engine side of things and reinstalled the blower several times, Im confident that area is correct. Using the JR FMU, is set to the proper static fuel pressure of 70psi with vac hose disconnected. Fuel pressure rises with manifold pressure up to 100psi like it should. The FMU was swapped out with a Vortech FMU for troubleshooting with no resolution so the JR FMU unit was swapped back in.

Im convinced this is a wiring issue with the JR EMS. Ive contacted Jackson Racing for help. Keith gave me a few things to try. I tried using a different ground for the EMS. The MAP wires are a problem area Ive heard. Ive quadrople checked all the wires and even soldered every connection. Everything looks right as I can see.

This kit is supposed to work as is. I really dont want to have my friend drop another grand for hondata and tuning. This is not one of those issues, something is broken here. I need serious help figuring out what it is.

Here is a real short video of a quick stab of the gas in 1st gear. It shows a fuel gauge on the left and a boost gauge on the right. If you turn it up you can hear how the engine is not smooth sounding. Dyuring this time I am holding the throttle in one position steady, about 50%. The large movement in the camera is caused by the bucking of the car.

<font color="#a62a2a" size="1">[ April 23, 2004 08:42 PM: Message edited by: Muckman ]</font>