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Joined: Nov 2004
Posts: 4
Newbie
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OP
Newbie
Joined: Nov 2004
Posts: 4 |
Hi over there!
Im from the UK with a Mondeo ST24 (2.5l Duratec V6) with a really irritating pinking problem at around 2500-3000rpm.
Heres a list of what I've tried:
Vacuum pipes are ok - no leaks.
Manifold gaskets fine (upper & lower)
Brand new spark plugs with correct gap - HT leads tested OK.
Tried 98RON superunleaded.
I've decoked the engine.
All valve and sensor wiring OK.
I havent touched the IMRC yet. Anyone think this will have an effect?
Damn pinking.
Cheers
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Joined: Mar 2003
Posts: 4,292
Hard-core CEG\'er
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Hard-core CEG\'er
Joined: Mar 2003
Posts: 4,292 |
not sure what "pinking" means in english...  do you mean the secondaries arent opening?
"Youth ages, immaturity is outgrown, ignorance can be educated, and drunkenness sobered, but STUPID lasts forever."-Aristophanes.
--93 pgt,headers,intake,borla=14.9 1/4mile
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Joined: May 2000
Posts: 21,197
I have no life
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I have no life
Joined: May 2000
Posts: 21,197 |
It's called pinging but what the car is really doing is missing. Change your plug wires and I'll bet you'll be fine. They are more important than the new plugs in these cars. I've been through 3 sets.
-'96 SE MTX 3L
-'98 SVT 1,173 of 6,535
-'05 Mazda 6s, loaded, g/f's ride
-Need a 96-00 manual on CD? PM or email me
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Joined: Nov 2004
Posts: 4
Newbie
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OP
Newbie
Joined: Nov 2004
Posts: 4 |
Cheers for your all the replies. Can you recommend a good set of leads. Ill see if I can get them over here. 
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Joined: Nov 2002
Posts: 216
CEG\'er
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CEG\'er
Joined: Nov 2002
Posts: 216 |
How did you decoke the engine?
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Joined: Oct 2004
Posts: 1,177
Hard-core CEG\'er
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Hard-core CEG\'er
Joined: Oct 2004
Posts: 1,177 |
Originally posted by GregH:
How did you decoke the engine?
IIRC you use an engine cleaner, like your injector cleaner. Coke = carbon.
1998.5 T-Red on Midnight Blue SVT
Build Number 5320 of 6535
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Joined: Oct 2004
Posts: 198
CEG\'er
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CEG\'er
Joined: Oct 2004
Posts: 198 |
Originally posted by Deanarse:
Cheers for your all the replies. Can you recommend a good set of leads. Ill see if I can get them over here.
There's a lot of good technical info on this site that can help you sift through the hype you'll find shopping for new leads ... and as you can see in my sig, I bought a set.
Magnecor Racing Wires
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Joined: Nov 2004
Posts: 4
Newbie
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OP
Newbie
Joined: Nov 2004
Posts: 4 |
Used the cheap decoke method. Ecotek's power boost formula- sprayed into the engine inlet.
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Joined: Nov 2002
Posts: 216
CEG\'er
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CEG\'er
Joined: Nov 2002
Posts: 216 |
Your pinging may be from carbon buildup on the tops of the pistons and other areas. The decarbon method you used may not have been adequate. There is a cleaner from motorcraft that is sucked in through the pcv hose (or any high vacuum hose) while running the engine at 2000 rpm after it is warm. Shut the engine off and let it sit for 10 minutes. Drive it hard and then repeat. Change the engine oil and filter when you're done and it'll be as clean as you can get it without taking it apart. If it still doesn't satisfy you, then you can retard the timing. Depending on the year, there is an actane adjust plug in the harness by the edis module, or it is a setting that can be changed in the computer.
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