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Although I am new to join this forum I have used it for months researching and finally buying my RX8. Now I have an issue that I'm stumped on and I've registered and I'm hoping someone will be able to pipe up and give me a suggestion I haven't checked. I'm currently 600 miles away from home at my parents place in the south of France and have an issue. I leave to go back to the UK on Saturday and I'm worried I won't make it, or it will cost me twice as much! Haha.
Anyway I have a 2005 RX8 with 90k on the clock. She has new plugs, coils(D585) with new leads, new cat, updated starter, starts perfect hot or cold and she hasn't put a foot wrong in the 3 months I've owned her. The problem I have is that on full or part throttle some of the time she feels to be flooding or bogging down. Power is well down but if I tickle the throttle I can get her to drive as normal. It's a very strange one. It idles fine and some of the time drives and picks up fine too. But as I'm so far away from home I'm worried if it gets worse what I could do to sort it. I took the plugs out yesterday and one of the trailing plugs gap was very very small. Alot less that it should have been, so I gapped it carefully and refitted. This made no difference. As I said they were replaced about six months ago before I bought the car along with the coils and leads. If I stop and restart the car it will for a short time drive normally with the proper power etc but then without notice or warning you will feel the loss of power. To the extent of doing 30 mph in say third and flooring it and it struggling to gain speed. If you keep it pinned it will eventually get to the high revs but it's not the normal free revving way. I hope this makes sense. I have a 600 mile journey to do on Saturday so have tommrrow to check whatever anyone says to check. I am a relatively competent with a spanner and need ideas. I have performed a brake pedal reset and this showed no change. I've used search but can relate nothing to my issue. The KS in advance and I hope you can help me with something that I have missed.
Also, since you reset it, it may be relearning fuel trims, takes a few cycles.
Really appreciate your inputs. Yes stock intake. I have cleaned the maf using electrical cleaner yesterday. No difference. It seems to be like this when hot and it's really hot here. I'm letting it cool to see if the issue goes away. It drove fine earlier from cold but as the heat soaks in its started again.
Do you have a full tank of fuel?
Weak pumps can overheat, don't let it get below 1/4 tank.
Yes full tank. Just started it after its cooled down a bit and the idle is poor and I can Hear a little tapping noise now. Can't tell where it's coming from. Strange.
Something arcing maybe?
Double check your leads, be sure they are snapped on firmly.
Just been out again. It's surely heat related. Now it's cool it drove fine. Then after a 30 min drive five mins from home it started again. I killed the engine while doing about 30mph, turned it back on and it was all good again.
Right first things first I managed to get home to the UK. 600 miles of nursing the car home.
After doing this mileage I have really got to know the issue i'm having. Before I left for the trip I pulled the plugs again and replaced them so I know they are good, secondly I pulled, cleaned and rechecked the leads and coils to eliminate these also. As the car had got cold during this process I also had the battery off to reset everything. When I restarted from ice cold it purred like a kitten. it idled better than ever smooth and quiet.
I thought I had fixed whatever the issue was and put it down to a dodgy plug or lead not being seated properly.
Now the good bit!
I started at 4am to drive back to the UK 600 miles. For the first 25 mins everything was fine. Then after slowing to a junction and trying to accelerate again the issue came back. The idle is poor, and there is a huge lack of power in any gear below 4k. After 4k the car starts to hesitate less but is still being held back. if you keep the throttle constant you can gradually get the car to creep upto speed and almost exactly on 4k it steps like something is clearing, it never really gets back to normal but you can make progress all the time probably being 60% of normal power. If attempting a hill id have to be down into 4th at motorway speeds to have the revs high enough to be able to keep my speed current. Also its using a lot of fuel like this!
As stated it seems to only have this issue when hot, at cold its normal. at all times the car starts and stops perfectly. Hot or Cold.
Anyone have any ideas? SSV? CAT?
I have the RotaryRevs d585 kit, magnacor leads and proper plugs, when they came out they were all nice and clean.
I don't want to have to put her into a garage to diagnose this issue but i'm running out of things to check......
09-08-2016, 09:19 AM
