Hi guys. I have a 97 JDM ITR. Recently there appears to be a lack of power at times. It can heppen when cold/war/start of journey/20 miles into journey. There is no definite pattern. It's been happening 4 weeks now. It even dies down to 700 rpm on idle when it's happening, and slows the car when throttle not being pushed. It's throughout the rev range. It feels like a loss of around 20 bhp. Any ideas? I am planning on upgrading to a DC5 next month - so don't wanna spend heaps on fixing. Plugs and leads are in it since I bought it 16k miles ago.....but leads cost 135 Euros over here!!!!! Not cheap! I've checked the plugs for cracks, and re-seated all connections I can see in engine bay. Any ideas?????

 

given the state of our roads i'd probably get under the car and check if you bottomed out & pinched the header or exhaust.
are you getting an engine check light ?

 

No mate - no lights. The only thing I could think of was that I hit the rev limiter 2 days before hand, and thought maybe that did something. So I disconnected the battery for a few mins to see would this reset the error....but still there. Can't figure it out - coz there's no real pattern to it....it's just random. It could just be in need of new plugs - but don't want to waste the cash on them if they're not the problem, coz I plan to sell it soon. Disaster!

 

I am having the same problem i think! Have you managed to sort it out? What happens to mine is on long distances all of a sudden it either jerks as though ther is no fuel, or loss of power as though there is full starvation or lack of compression or something! its terrible since it only does it sometimes but when it does its bad. I have replaced plugs, leads etc and it doesnt help. Does this sound familiar?

 

vtec fluid is low,

j/k

check your air filter and plugs, simple things first do basic maintenance first then see how it runs.

do you have any modifications?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SilverDc2 &raquo;</TD></TR><TR><TD CLASS="quote">

check your oil</TD></TR></TABLE>

 

i was assuming he was smart enough to do that you never know though.

 

I have replaced air filter, plugs, fuel filter, leads and distributor cap. Anything else that you can perhaps think of? I dont think its electrical though? It has never done this before. like i said it only seems to do it on long journeys after running for a while, almost as though a valve is getting blocked/stuck or something. Forgive my ignorance but i am no mechanic and when i take it in for a diagnosis they cannot fault it as a on brief drive it goes like a bomb!

Thanks again guys!

 

clogged catalic converter, your map sensor is going nuts, timing off?

is the car moded at all? have you done anything to provoke this? over rev?

 

No, car is not modified at all. No Over Rev either. any reason in particular why it would only do it on long journeys? When driving on a flat stretch after abt 45mins, when i accelerate it does not do anything as though not getting fuel then it suddenly takes and goes, however if i keep it at that speed it does same thing if accelerate further. When coming into a town though after this performance the power is gone as though there is starvation. If i stop and leave it overnight when i drive the next day its back to 100% power provided i only use it for town driving. anything to do with constant revs for a certain time frame perhaps? temperature? i have had a similiar problem with a blown gasket in another car however it would do it all the time then? temp remains half way all the time. (not overheating)

 

I got mine sorted -was a carbon build-up in inside of rotor cap. Cleaned it off, and sound now. Gonna go ahead and change plugs now. There a set of NGKR PFR7G-11 in it now - anyone got any recommendations???? Its a 97 JDM ITR.

 

I am starting to wonder if you are losing your fuel pump. I had a Volvo do similar things and it was the in-tank pump. It would be fine until it had run for about 30 minutes then it would start to act up.

You may need to get a pressure gauge on it and check for fuel pressure. There is also a possibility that you have a ignition coil failing after it heats up. You can check that with a meter but I do not have the resistance values for primary and secondary coil in front of me. Take the value then run the car until it happens again and then recheck the value and see if the resistance changes. I have the factory manuals at home or I would give it to you now. Maybe someone can chime in?

Good luck

 

A buddy of mine had the same problem. Rpms wouldn't stay consistant. When he stepped on the gas it would bog down then seem to respond. It turned out to be some kind of ground problem. I can ask him and see.

 

Try the fuel filter.

 

check your compression on each cylinder.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Castle_ &raquo;</TD></TR><TR><TD CLASS="quote">No, car is not modified at all. No Over Rev either. any reason in particular why it would only do it on long journeys? When driving on a flat stretch after abt 45mins, when i accelerate it does not do anything as though not getting fuel then it suddenly takes and goes, however if i keep it at that speed it does same thing if accelerate further. When coming into a town though after this performance the power is gone as though there is starvation. If i stop and leave it overnight when i drive the next day its back to 100% power provided i only use it for town driving. anything to do with constant revs for a certain time frame perhaps? temperature? i have had a similiar problem with a blown gasket in another car however it would do it all the time then? temp remains half way all the time. (not overheating)</TD></TR></TABLE>

i seem to be having the same problem now. but it only started having this problem after i had my valves adjusted.

before valve adjustment: my cold starts developed an unsteady idle, but after driving and running the car at normal operating temperature, the idle would be normal.

after valve adjustment: my cold starts now have a steady idle, so i assumed i had the problem fixed. but now i have this problem that u are having. so it's probably a good idea to go back and check the valve lash again.