I asked this in the Prelude forums with little feedback, I'm confident I'll get better response here.

I've done a lot of searching but a lot of common 'safe mode' issues seem to deal with VTEC or CELs - mine's not. This is on a pretty much stock jdm H22a with virgin p13.

Here are my symptoms:
Overall the car runs pretty well minus pretty bad gas mileage.
Occasionally at the start the car will feel sluggish and I would have to put in a bit of gas not to stall.
No CELs
Rev limit at ~6800 (stock should be about 7400).
VTEC engages throughout post 4,900rpm (stock should be around 5,500 I believe).

These are the symptoms under normal driving conditions. I don't beat the car, I don't exceed 80mph and the car's warmed up as I endure these issues. Oil level is fine and speedo/tach isn't off ect...ect...

Has anyone experienced the same issues as me and figured it out? I know it could be several things... I'm trying to find another ecu as we speak. Someone (in the lude forum) said bad timing... but I am wondering if the car will even run that well if the timing is off... I wouldn't think so? So if you've endured what I'm going through let me know. Thanks

 

ttt

 

ttt

 

stock jdm h22 gets vtec at 4800 and redlines at 6800.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by oneludesol &raquo;</TD></TR><TR><TD CLASS="quote">stock jdm h22 gets vtec at 4800 and redlines at 6800. </TD></TR></TABLE>
You're probably wrong.

Not 100% sure on the vtec x-over, but I'm sure all h22s redline at 7200 and limit at 7400-7600. So my limit is about 800 lower on an accurate tach.

 

your p13 is usdm from an obd1 prelude which has a redline of 6800 and vtec crossover at 4900 or something like that

 

edit: I don't think you're right.

http://honda-portal.com/honda-..._id=6


Modified by Lou_EM1 at 9:21 PM 6/7/2008

 

visual differences im not really sure, but theres some pictures on this link of a jdm p13 if that helps u
http://www.preludepower.com/fo...60246?

also you realize that the jdm version has a speed limiter at like 113 or something

have you thought about other ecus such as the p28 or the p72 and getting it chipped/tuned

 

The motor is pretty stock and I'm planning on keeping it that way. And I have no intentions on going past 113... or past 80 for that matter.

Up because I think the only H series that redlines near what I am is a non-vtec. But obviously I have vtec motor and ecu.

 

chipping your ecu on your usdm p13 may be easier/cheaper than looking for a jdm one

if you really want a jdm one id search reputable dealers, and maybe ebay if your desprate

 

I edited my post, I don't think you're correct in thinking that I have a usdm ecu. I think all P13s should be going to 7400 rpms without problems.

 

swap it out with someone elses ecu may be an ecu deal, maybe ur tach is off by 500rpm or so, i know my stock one has always been way off