Engine Help Part 2


C

chief_67

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Sep 4, 2008
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I have a 1997 EK9, and when I'm driving at low revs it does a slight misfire not a big one just a small one and mainly in 1st and second gear, in the other gears aswell but not as common as the first two gears.

Also when i put my foot down in 1st gear it's holding back now and again but in vtec it's strong as it should be.

I got it checked from my mechanic he started it up and first things he says is the valve clearances need doing together with a fuel filter change as the engine was sounding weezy as he described it, he checked the spark plugs and they were fine.

It's had oil and filter change two weeks ago.

Are the symptoms described above got to do with the valve clearances need doing what else do you think it could be, is there anything else I should change whilst I get the valve clearnaces done.

Thanks in advance
 
Do you think the valve clearances would not need doing or you reckon that the dizzy should be checked whilst getting the valves done. When you mean the dizzy timing do you mean the timing belt or as my mechanic say "check the timing". He has one of them gun type thingies thats flashes which checks the timing. Or do you mean check the distributor or shall i just check both.

The timing belt was done 8000 miles ago.

I'm going to get my mechanic to check everything, what else do you think it could be so I can get him to check that aswell.

Thanks Vtec6000
 
No - the distributer timing is when the spark will be delivered and it has to be exactly right. It can be adjusted easily but may need a timing gun to set it up right.

If your timing belt wasnt in time you would know about it. Even if it was just out by a tooth.
 
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What will happen if my timing was out will it feel lumpy.
I'm going to be getting him to check over everything and hopefully it will remedy it.
 
If your timing belt was out by just a tooth it would prob be lumpy / underpowered and definately misfiring if it was more than a tooth you would be looking at bent valves and piston damage.

With dizzy timing out you would have a misfire like you are telling us and possibly running on and off 3 cylinders depending how bad it is. Prob be poor on fuel and your mechanic is probably hearing pre-ignition and is thinking the valves need adjusting.

Do these engines have knock sensors Vtec6000 ?? I dont think JDM motors did have so it wont be retarding the timing.
 
You will prob hear it pinking / pinging sounds like a little knock thats the pre-ignition incase you were wondering.
 
That running on 3 cylinders doesn't sound good and it is a bit poor on fueling meaning it not giving me good mpg. I better get it checked out before next week.
As for the knock sensor what does that mean if it hasn't got one then it's wont be a timing problem or vice versa can you confrim vtec6000:)
 
Im not sure if JDM engines have knock sensors - they prob do and what the knock sensor does is picks up when the engine is starting to pink, the ecu receives a signal from this sensor and retards the ignition to suit.
 
Barryl85 said:
You will prob hear it pinking / pinging sounds like a little knock thats the pre-ignition incase you were wondering.
Click to expand...

No mate your wrong pre ignition is entirely different to pinking/detonation. Pre ignition is when the air/fuel mix ignites in a cylinder before the spark plug fires. Detonation/pinking occurs when the mix has been ignited by the spark plug but a pocket of air/fuel explodes outside of the envelope of the normal
combustion front.

Have your mechanic check distributor timing is set to 16degrees btdc or middle mark on pulley using a timing gun.
 
Well there you go ! thats why i was shoutin on you to help lol

Pre ignition cause by the compression then ?
 
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Will get him to check that, the car is in safe hands as he is a well known honda mechanic with b series turbo, supercharger, conversions build under his belt. He also done my b18c6 conversion on my crx sir ef8 which I'm selling if anybody is intrested.

Thanks for all your help.
 
Barryl85 said:
Well there you go ! thats why i was shoutin on you to help lol

Pre ignition cause by the compression then ?
Click to expand...

There is many reasons that could cause it to occur I'm on my iPhone now so not gonna type them all out as it's a pain in the ass to type on but the main ones would be a hot carbon deposit or wrong type plugs been used sharp edges on piston or valve etc etc.
 
Just got my car back from the mechanic and it was a close call as the timing weren't put on properly and it was getting slacker and slacker.
Anyway got that sorted togther with valve clearnces, fuel filter change dizzy check etc and the car is f***kin quick.
Exactly how my previous EK9 performed.
 
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