I have a 2000 gsr integra that seems to be running extemly rich, it won't rev over 4500 rpm, it Also has a rough idle. I have had the engine machined to 81.5mm with ctr spec pistons. The head has been milled and the block has been decked that is the only thing that has been changed, I have replaced all seals from the valve seals to the oil pan. It has new plugs, new wires, new cap and rotor. It has a test pipe on it. Im still running the stock gsr intake manifold and exhaust manifold and the stock obd2 gsr ecu. I have checked timing and adjusted the valves I have made sure the tps and map sensor are plugged in correctly. It only has one code in it and it's a random missfire. I'm open to any suggestions

 

is it blowing smoke?
double check your wires are in fireing order

 

CTR pistons in your gsr? Did you check ptv clearance? Misfire can be caused by a series of crap. Have you tried a different distributor? Have you also tried a ecu with a somewhat close basemap for the setup?

 

The firing order is correct but it does smoke and it was piston to valve clearance is suffiecint I have not changed ecu's that is a good thought

 

Sry I messed that up I meant to say the ptv clearance

 

Was checked

 

did you change intake manifold? i had same problem after changing all my bolt on's.... found out combination of not properly tourqed down intake manifold and wrong fire order was the fault. hope that helps

 

You shouldn't be running a stock ecu. CTR pistons are way different from GSR pistons. Just looking at it should tell you already.

 

I am sorry I have a correction the engine is running type r replica pistons not ctr sry

 

But I'm thinking another ecu and manifold will do the trick

 

I have ran ITR pistons with a stock ecu before. Car ran fine. I don't think another manifold will do you any good. Try a different ecu

 

you and me are having the same problem. keep up to date with my thread on it and maybe we can both figure it out.

https://honda-tech.com/forums/acura-integra-6/rough-idle-problem-then-dies-after-warms-up-3000459/

 

had the same problem on one of my buddies LSV. replaced the ecu n it worked fine. it actually wouldnt rev past 4000 n it would cut out. but if you slowly got onto the throttle it would rev to about 5 n quits.

if you can find someone with a ecu they would let u borrow for a few n see if thats your problem.

 

Bump

 

What is the cel?

 

WAIT WAIT WAIT, coming from the guy who said i was an idiot for running type r cams on a gsr ecu????

 

1399

 

I'm gunna order the jumper harness. My brother has a Ecu i can borrow. Bump

 

i tried borrowing a friends ecu. a 2000 gsr ecu. the immobilizer wouldn't let me use it?

 

my problem ended up being a clogged cat. maybe something to check.

 

^ well im converting to obd1. Do those ECUs have an immobilizer too? And well i have a test pipe i'll have to check it. Bump

 

i have itr pistons in my 98 gsr and it runs fine/ passes inspection on its stock ecu.

u can try picking up another ecu i actually have one that i can sell u 50$ shipped

sounds to me like ur timing might be off but u said u checked it.

kind hard to tell without hearing it so if u can get a vid up that would help

 

depending on how much was shaved, it usually means you have to degree the cams via adjustable cam gears. check vacuum at idle and if it's something like 15hg and not 22hg you either have a leaky head or cam timing is off.

ignition timing being off is another thing. how does the car idle and when you set timing were you actually able to do so correctly?

it also could be be something as simple as bad plugs / wires.

do a compression test while you're at it, make sure to unplug the distributor before you do

fixing problems like this are a process of ruling things out. if i were doing this i would

1. compression test
2. switch plugs, you can kill a plug by dropping it on concrete so it's not too far fetched
3. try another wire set
4. check cam timing
5. check injectors

somewhere in here you should find your problem

 

Figured it out thanks everyone for your help..cam timing was off