Injector woes

Bri · Post by **Bri** » Sun Sep 21, 2014 3:20 pm

Hey, I need help in so many way but this is the one Im struggling with

I have a misfire on cyl 4 on H22A8 got a spark on plug. Changed fuel filter, changed the injector twice and even cleaned the EGR valve, changed ECU and even the connector on the injector loom. Any other ideas pleeease tell me lol.

mercutio · Post by **mercutio** » Sun Sep 21, 2014 3:22 pm

you sure its not the leads?

Post by **Donald** » Sun Sep 21, 2014 3:53 pm

If you're in no rush and don't have any spares (but I'm sure you do) I have known working stock leads from my H22A8, yours for postage cost but I won't be able to get them out til Thursday.

Post by **4thgenphil** » Sun Sep 21, 2014 4:44 pm

You running obd1 or 2? Of its one try swapping your resistor box

Bri · Post by **Bri** » Sun Sep 21, 2014 10:02 pm

OBD1 Phill

I have done the resistor box, fuel pump, dizzy, leads, plugs, injectors, fuel filter and ecu firing on all 4 again now will see if it has cured it tomorrow. Also another problem I got 3 exhaust systems here and all 3 are fooked. I need an after market downpipe used preferably if anyone knows of any? Cheers will post in wanted now.

Bri · Post by **Bri** » Sun Sep 21, 2014 10:04 pm

Donald wrote:If you're in no rush and don't have any spares (but I'm sure you do) I have known working stock leads from my H22A8, yours for postage cost but I won't be able to get them out til Thursday.

PM on its way man

Post by **Drax** » Thu Sep 25, 2014 10:23 am

Valve Clearances sorted it

Matt researched the cause a bit today and found this;
http://www.riderforums.com/zr-7-mainten ... post451011
that's not h-series related but it makes sense if you look up h-series valve seats.

He says the valve seats on the h-series head are relatively soft, which means the valve gets a good seal against the head, which is good for compressions, but over time it wears the seat down slowly meaning the valve ends up slowly receding in to the head over time therefore the top of the valve gets higher up, pushing the rocker arm higher arm and reducing the clearance between the rocker arm and the cam shaft.

The other factor, in addition to valve seats would be the strong springs honda tend to use on their vtec engines that'll have the same effect.

Post by **Donald** » Thu Sep 25, 2014 1:38 pm

So this issue is definitely solved @Drax?

Only asking as I was due to be going to the PO today to send @Bri stuff but if this is all sorted I shan't bother.

Post by **Drax** » Thu Sep 25, 2014 2:13 pm

Donald wrote:So this issue is definitely solved @Drax?

Only asking as I was due to be going to the PO today to send @Bri stuff but if this is all sorted I shan't bother.

yes mate, all sorted but ill get Bri to contact you before hand just in case