I am new to Evo's but not new to the import community. I own a high performance Honda shop in Orange and I purchased my first Evo last may. We specialize in NA builds so this turbo stuff is still new to me...HELP...

EVO X GSR - Harman Motive UICP, Harman Motive intake 4700 miles. I know the intakes lean these things out and mess w/ maps. I have launched it a few times and I drive it like I stole it sometimes.

I had it tuned when I left the dealership. Ran great. Put the Intake on (no tune). Ran great. Put on the UICP (no tune), ran fine for 2 weeks then....

Lets say I shift from 1st to 2nd, rpm is at 4000, then I mash and rmps surge to 1000 and then drop 200 rpms and its fine. At first I thought it was a slipping clutch. Then I hooked up a reader and it shows P1320. I know what it is because I searched. But I noticed other people w/ this code havent mentioned my same symptoms. It feels like clutch slip but then it grabs and is fine through out the rest of the rpm range. Shift into 3rd, same thing happens. Does it from 2nd through 5th gear. Also happens on the freeway in 5th and I change lanes to pass. Surges 1000 then its fine. Doesnt happen if im easy on the throttle. DOES happen at anything over 50% throttle. I had a buddy whos a tech drive it and we did a stall test. Stall test was fine and he said doesn't seem to be the clutch. I'm just not sure. When the rpms jump there is NOT a loss of power. The car goes with it like there is a short boost of power. Does anyone have an idea of what this may be? I know the code thrown is because I have not tuned it after the intake and uicp mods, but would P1320 casue that drivability issue?

Thanks in advance for the help.

 

What do you mean you had it tuned when you left the dealership? Do you have any kind of tuning in your car right now?

 

It was reflashed and tuned on the dyno right after I bought it. It has not been tuned again since the 2 mods. Im still on the first tune.

 

Well then that is probably your problem. You should retune or ditch the aftermarket parts.

You can run those parts on a stock tune, but if you tune with stock parts then put them on you are running on the edge of destruction especially with an intake that might be leaning your car out to dangerous levels since the tune probably already brought you into 11's range afr's.

 

Why would you tune and then put on parts? I'm sorry, but it's supposed to work the other way.

It's no wonder you are having drivability issues, not to mention the danger it is to the engine. Good luck.

 

^^^ Well I got it tuned because it was very disapointing when I left the dealership. MUCH SLOWER than expected. Got it tuned and loved it. Added the parts not thinking much because mods to Hondas (as i'm used to doing) don't cause problems like this. Yes, I know it's 2 very different worlds but it slipped my mind. I figured intake an uicp are very minor mods, no biggie. Guess not haha.

Anyways, it seems like thats the problem. Like I said, this turbo stuff is all new to me so thanks for being kind and helping out.

To be perfectly honest, I am a Honda guy at heart, BUT I will never go back to driving a built Honda daily after daily driving this car. I am in love w/ this Evo. It's a completely different world from Hondas when it comes to mods, so now I know to be a bit more careful. Thanks again.

 

Your clutch is slipping. The X ecu is a bit complicated and I suspect the P1320 (timing retard insufficient) is generally related to the load and tps changes that occur during the slip, though that does not make sense given the monitor is only active BEFORE collant temp excedes 100 Degrees F.

a snip from the shop manual on the check and set conditions for P1320:

Check Conditions
• Under the ignition timing retard control.
• Engine coolant temperature is between 7° C .
(45° F) and 36° C (97° F).

Judgement Criteria
• For 10 seconds, the difference between the basic
ignition timing and the target/specified ignition
timing is 3° CA or less on average during the
retard control.

It's not un common to see several codes fire at one time even if they may not all be related to the issue that caused the relevant codes.... I'm starting to think these situations could be can bus related. I know for a fact I have thrown a can bus error once and when I did, it also threw several other random codes. No real reason why it coded other than a can bus communication problem. If you've done any reading on canbus it kinda makes sense because the can bus is a broadcast based network with back off provisions to prevent faulty devices on the bus from rendering the bus un usable by the rest of the talkers by creating a bradcast storm of sorts.

 

Crap. You just pissed in my Wheaties. And you sound too smart to be wrong. But I hope you are!

I have a tune scheduled for tomorrow at 8AM so I will let you know if its the clutch or not.

 

The car needs neon lights and a bigger wing and it will be fine.

 

I'm confused about why you thought that would be helpful? I'm assuming you think i'm one of those ricer honda guys...am I right?

Or was it so you can crack up all by yourself when you see a couple "lol" responses from other members on here?

Good one man...neon lights and a bigger wing...good one.

Thanks to everyone else for the real help...I knew it was too good to be true...there's always 1 cool guy w/ no friends that tries really hard

 

even if it is your clutch, the tune will only help you from running too lean.

 

No I know that. I'm just not convinced it is the clutch yet. My friend owns the tuning shop so I am going there tomorrow morning early to confirm everything. My gut says clutch

What I hope is happening is that the ecu is causing the issue based on the mods added w/ no tune. I said "I hope" haha... not likely though.

 

No high performance turbo hondas come through your shop?

 

who does your tune

 

Nope I don't do turbo setups because I don't know enough about them. I have done NA builds for Honda Tuning, Modified Mag, Super Street...etc...but never forced induction because that isn't my specialty. That's why i'm here

Anyways, it is the clutch ...

Church Automotive Testing near Long Beach is where I go. Sean has been tuning my customers cars and mine for about 5 years now.

I will be doing the clutch next week so I will let you guys know how it goes. I have done clutch changes on some 8's and 9's and from what I have read they are somewhat similar. I may not know turbo drivability issues or the fact that these evo's eat clutches, but I do know how to fix them '

Thanks again everyone and I will let you know how the clutch change goes.