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Renamed: High RPM, Lean Misfire Problem 

 

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Posted: Wed Aug 31, 2005 7:25 pm 
Getting Side Ways
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hey wobbo, mine doesnt get hot, stays normal temp, just splutters like a b**ch (hestitant in high rpm) if u can find out the prob we'd all be real appriciated hehe, voxace, it was there even before i got my cam, so it wouldnt be the cam timing i wouldnt think...


- Grechie

 

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Posted: Wed Aug 31, 2005 8:47 pm 
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Yeah, who's to say it wasn't out before. I wasn't suggesting it was due to the cam install.

 

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Posted: Wed Aug 31, 2005 8:52 pm 
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iv'e only got the stock xr cam in mine but it happened after i blew a heater hose so yeah. ill hopefully go to ford tomorrow and yeah get back to you. hey Grechie how many k's do you get to a tank??
I found after all this happened i now get about 250-300 out of a 68ltr tank.

 

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Posted: Wed Aug 31, 2005 9:59 pm 
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hey wobbo id say id get about that, i got about 172KM's out of half a tank. so bout 350 a full tank ...used to be 530km on CFI engine

 

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Posted: Wed Aug 31, 2005 10:02 pm 
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thats f**k i get about the same its so f**k.
How long has that been goin for?

 

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Posted: Wed Aug 31, 2005 10:03 pm 
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since i got the engine put in..it never just happenend, ive always had it since i did a MPFI conversion (new engine and wiring n ecu)

 

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Posted: Wed Aug 31, 2005 10:05 pm 
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i get fairly good fuel economy and my car keeps really well temperature..

so im not with u there...... but im stilll cant rev it out. The cam helped it a bit, but still does it. At the track i couldnt rev it out (coz it took to f**k long) so i had to change into 4th. Which p****d me off, coz a VL turbo managed to just poke his nose infront of me and ran a 14.6 when i ran a 14.8 so i KNOW its stopping me form getting a decent time!!

Does the engine sound rattly at all? Wobbo?
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Posted: Wed Aug 31, 2005 10:07 pm 
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i defently np eed-250 wot u mean, i can lovely pull to 100 quickly...but then after that im real high 16's 1/4 mile...Pathetic!

 

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Posted: Wed Aug 31, 2005 10:15 pm 
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GRECHIE MATE LISTEN UP!! Bom Bom Bom is the sound of a lean misfire.Forget the other stuff. If your injectors are clogged this will happen.Anither cause is an air leak.Check the manifold bolts/gaskets and o rings on injectors.

 

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Posted: Wed Aug 31, 2005 10:19 pm 
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Remove your spark plugs one by one and check the colour.The cylinder playing up will show a different colour to other plugs.Or for that matter check the colour of all plugs and let us know.

 

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14.77 @92.71mph July 06 14.52@95.68mph July 07 14.241 96.7 MPH in a shoebox/taxi au ford wagon!!Bwahahah still cant believe it!!!

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Posted: Wed Aug 31, 2005 10:43 pm 
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does it only happen at a certain RPM?

mine is 4800-5200, the faster u go the less RPM the lag kicks in at..
3rd to 4th is the worse at about 4600-4700..

WHat rpm does urs happen at? Can u rev it out past the lag?
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Posted: Thu Sep 01, 2005 1:40 am 
Getting Side Ways
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Ride: 98 XH XR6

Location: Diamond creek
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USELESS iv'e had my injectors cleaned ive had each cylinder checked for leaks iv'e had each of the manifold bolts/gaskets and o rings on injectors checked for leaks then replaced then checked again and its still s**t.I've also had each spark plug and lead changed and they are burnin fine so its not really anything to do with the cylinders.

eed-250 my engine doesn't sound ratty at all when it starts the fords have a double miss on the first cylinder (or thats what ford and my mechanic told me) so it doesn't sound to bad. But like i said the fuel economy runs really really bad and its just got no balls. My mates got a stock gemini and he beats me and mines a XR so you work that s**t out

 

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Posted: Thu Sep 01, 2005 10:08 pm 
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USELESS wrote:
GRECHIE MATE LISTEN UP!! Bom Bom Bom is the sound of a lean misfire.Forget the other stuff. If your injectors are clogged this will happen.Anither cause is an air leak.Check the manifold bolts/gaskets and o rings on injectors.



hey man how would u go about checking for a air leak on the manifolds??

also ill check my sparks...wouldnt a air leak from the manifolds trouble me all the time...not just high revs in a gear other then 1st ? (1sts the only gear that wont play up)

 

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Posted: Thu Sep 01, 2005 11:13 pm 
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sorry to get of the topic but Grechie you don't have a mate that lives in diamond creek do you??

 

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4.0ltr 1998 XH XR6 - 2 JVC 4way 6X9's - 2 JVC 4way 4" in doors - JVC head unit - AU XR8 intake snorkel


Paceys, hi flow cat and many more still to come

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Posted: Thu Sep 01, 2005 11:23 pm 
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wobbo wrote:
sorry to get of the topic but Grechie you don't have a mate that lives in diamond creek do you??



nah dude i dont sorry lol

 

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