CO_RaceFab

We are on ngk4554

V-SPEC 1

Wow, 8 heat range, non resistor plugs and making good power. That's awesome.

CO_RaceFab

The car has only been 163mph granted it's on the limiter for a few hundred feet but I don't think there is anything wrong with that heat range. the plugs read fine and 9s lose power.

V-SPEC 1

I normally run 9 heat range resistor type plug on my Hondata CPR . I Might go down on the heat range to see if I see any difference.

CO_RaceFab

9 is definitely more safe and probably only loses 10-20hp if our shop car had actually touched 1000hp on the dyno I probably would have changed plugs but it spun at 900 so I left it alone but we did turn it up at the track so I dunno what it really makes for power.

crucian

Anyone that daily drives with the CPR, are you experiencing a random misfire or hiccup while driving normal? Happens to me but also heard of it happening to other users. I did a lot of troubleshooting and swapping but can't seem to track it down.

seelback

I street drive on my hondata cpr, not daily but sees alot of street mileage and I have no issues. I do have a little tps issue that gives me a slight hiccup every now and then, I need to change my tps or tps plug. With that being said, try looking into this being a tps issue. One thing i've seen personally about the cpr kit is that its a must to use only oem honda dizzys, aftermarket dizzys will give you misfire issues and breaking up in high rpms.

crucian

I replaced the tps and MAP already even though all sensors register normal while dataloging. Im also on my second CPR kit. There is a thread started on the hondata forum.

CO_RaceFab

I fought my cpr stuff all season sounds like that same issue I'm having.

stevenson_18

I pulled my cpr out it was breaking up so bad and misfiring and went stock ignition

0mtber

iTrader: (2)

Only time I have seen people have issues with a CPR system:
1. Using non-resistor style spark plugs instead of resistor style.
2. Hacked up wiring or wiring harness.
3. Aftermarket wiring harness (tucked etc)
4. Aftermarket distributor pickups. (Aftermarket distributor)
5. Aftermarket coils instead of oem honda/denso

If you do everything by the book you won't have problems with the system.

crucian

What I don't understand is, why my stock ignition system drives perfect with no random "all of a sudden jolt" and then soon as I put the CPR in, it gives a random jerk. Just out of the blue I could be driving then bam, it jerks. Trust me, I tried everything to get rid of the problem and the only thing that fixes it it putting in the stock ignition.

$MIKE$

iTrader: (13)

ALOT OF PROPLE HAVE ISSUES WITH CPR.
Go on the hondata help forum, most of the hondata staff are helpful.


I finally got mine to work I had to get
a new harness (rywire tucked)
brand new oem dizzy.

crucian

I posted on there, but they swear by their product. I put a brand new OEM dizzy on already. I guess I might have to try a new wire harness.

$MIKE$

iTrader: (13)

I would if it's an old oem harness mine looked good but I figured that 14 years old might have issues that are unseen.
Also check all your grounds and beef them up I used big 4gauge wire.

Lazysk8r2

I had the same issue, i used a different ECU and it stopped. Then i ran into more problems car started shutting off while driving. Ended up putting everything stock back in still shut off, then used my valet key and it stopped shutting off so going to try and put it back in.

AZ_CIVIC

iTrader: (1)

I have not had 1 single issue with CPR in 2 years, however a few years ago before I ever went to the CPR unit I had the same problem some of you guys are describing. Sometimes when I would be driving it would jerk real bad out of no where. For example if I were driving for 20 miles, I would get these weird hiccups at least 5 times in the 20 miles. It would cause the car to jerk real bad like the car was shutting down.

I think the problem ended up being that I was on a real old software update and needed to update my software to a new version. Once that was done the jolts stopped and I didn't have that problem anymore. I didn't change anything at all, my tuner just did something with the software and it fixed it.

Turbokraft

I have used the valuable resources of Honda tech for years and thought I would contribute something that might help CPR users. I have the kit daily driven for about 90 days, no install problems no drive problems (97 hatch,stock engine s300v1 factory 100k dizzy) I am a professional tuner and mechanic with considerable experience hired to sort out a no start CPR equipped H22 turbo race car. The car: 99 coupe, H2B, "mil spec" harness, s300v1. Problem: will not sync. Diagnostic process: Existing ecu tested for data logging uploading maps etc., perfect function. Substitute shop use s300v1, still no sync. Test "mil spec" harness for correct pinning, paying particular attention to t'stat ground area, correct. Use B series dizzy for testing, ground to engine spin by hand, could randomly sync by spinning rapidly also fire coils randomly during brief sync period. Contact Hondata, order new CPR to acquire Hondata Harness for CPR(not sold seperately) Install harness noting that the wire diameter is .032" larger than "mill spec" harness. Still no sync. Upgrade grounding cables from bumper mounted battery to engine and chassis. Ground chassis to V/C via heavy weave cable. Still no sync. Substitute new CPR unit, no sync. Measure amplitude of inductive sensors using ociliscope from dizzy at ecu of 97 hatch and compare to 99 coupe, surprise, coupe is 50% lower in amplitude. Acquire OBD1 OE engine and dash harness removing only the 6 inductive sensor wires required for CPR from each and fab custon harness using all Honda wire and connector B from donor harness, syncs in 1.5-2 seconds. Connect inj. harness to 2200cc inj. starts and idles in 1.5-2 seconds first try. Note: Honda wiring is ..020" larger than "mil spec" wiring. Sorry for long post, hope this helps.

boosted hybrid

I'll contribute to this thread as I have probably tuned and installed well over 75+ of them at this point. I would say out of those I have had 3-4 that had random misfiring issues that I could not explain, and I was not able to resolve it during a tuning appointment. I had a car that we built in house that did experience this, and I put hours of testing on the dyno to try to isolate and resolve the problem. It came down to the ecu itself as being the cause. I was not able to distinguish anything in particular wrong with the customers ecu other than when we swapped to another good working s300 prepped ecu using the same s300 board the problem would go away. The only other common issue I have seen is G101 ground on the thermostat housing is not clean, or good and it causes problems. For all the people with random misfiring problems that you cannot resolve, try another s300 prepped ecu.

seelback

+1, ive also seen the ecu causing the misfire issue, changed ecu and boom back in business. also make sure all your grounds are good and clean.

seelback

awesome info!!!

Turbo-LS

iTrader: (4)

For the money you have to put into those to make them work doesn't seem logical to me. It's not like the software is capable of doing individual cylinder ignition trim. Single coil setups done right work just fine. M&W setup is top notch or you can do Ignitor delete with a less expensive ignition box and a solid coil and never have issues. Made excellent power with my cheapy setup and ran big plug gaps without spark blow out or breaking up and it was a very hot spark. Increased lower end power as well. Nice strong spark really makes these engines perform a lot better and get a more complete burn of the a/f mixture

turbohatch96y7

iTrader: (15)

How much does a new s300 with coils and cpr kit cost all said and done?

crucian

$650-$700 average.

Turbokraft

The car I posted about on 9-10-14 was tuned on low boost today (12.5- 12 psi) and turned 9000 rpm with no CPR related problems. 8 heat range iridium NGK plugs, gap set at .035". The coils were used, sourced from an RSX. Car started easily and had no hiccups that I could detect. The original problem was an inability to sync, I have since read of a few high RPM misfire issues and thought I would share my experience.