Hesitation at 4500+rpm

[VAROOM]

hi there,

sorry to bother you...but i was hoping you might be able to give me some advice on with my problem.

i have posted in the s14 tech section but i reckon you are the man i need to speak to as you know the ins and outs of these cars...here is the link

http://www.sxoc.com/vbb/showthread.php?t=298272

i would love to take my car to you to get set-up properly but im way up in the north highlands of scotland without a consult and i dont really want to take it to my local nissan dealer coz i don trust them.

any help would be great dude!

cheers.

[Jez]

Sounds like cam or ignition timing. Did you set the ignition as per the instructions on my web site?

[VAROOM]

Sounds like cam or ignition timing. Did you set the ignition as per the instructions on my web site?

Hey,
i did read your article but i dont have a consult is this the only way to set it properly?

i set mine by disconecting the tps the adjusting the idle the setting the cas to 15deg btdc.:rolleyes:

could my knock sensor be mucking things up without actualy showing as a fault code?
when my car overheated it did knock quite a lot and the sensor casing looks like it has had a good roasting so maybe this has damaged the sensor?
will my car run happily with it disconnected just to try and see if this is the fault?

cheers.

[Jez]

Hey,
i did read your article but i dont have a consult is this the only way to set it properly?

i set mine by disconecting the tps the adjusting the idle the setting the cas to 15deg btdc.:rolleyes:
I've found that the tps method does work reliably :(


could my knock sensor be mucking things up without actualy showing as a fault code?
when my car overheated it did knock quite a lot and the sensor casing looks like it has had a good roasting so maybe this has damaged the sensor?
will my car run happily with it disconnected just to try and see if this is the fault?

If the sensor is malfunctioning it will make the car behave in an odd manner. You can just disconnect it - the ECU will detect the fault and retard the ignition.

[VAROOM]

Cheers for that,

im thinking it must be a vvt fault then.

maybe my solenid got fooked because of the head overheating.

my vvt rattle has gone after fitting the head gasket:wack:

another thing i noticed when i was fitting the inlet cam with the vvt pulley...i tried to rotate the cam slightly to ease the chain back on by turning the end bolt with a spanner but instead of the cam rotating something moved inside the vvt pulley:rolleyes:

so im wondering if inside my vvt pulley is stripped or something:annoyed:

[VAROOM]

Right,

i fitted my new vvt pulley and solenoid today and the car is tonnes better,it pulles much harder now.

BUT...once i reach about 5700-7000rpm it has a major flat spot:annoyed:

i fitted new spark plugs when i did the head, but when i tried to start it i had the cas in the wrong position and after trying to start it like this for ages thinking i just flooded it....do you think this could have affected the plugs causing my new problem?

(i had denso ik24 before now got denso ik22 fitted)

the car was perfect before i roasted the head:cry:

[Jez]

Have you set the ign timing correctly - as per my web site?

[VAROOM]

Have you set the ign timing correctly - as per my web site?

Yeah but i had to do the method without a consult.

ie disconnect tps ,adjust idle,put ht lead between no1 coil,set to 15 deg

cheers.

[Jez]

I've found that unreliable in the past.

[VAROOM]

I've found that unreliable in the past.

bugger,so the only way to do it properly is via consult?

how much would you charge me for a consult cable and software?

i really dont want to give my car to my local nissan boys i wouldnt even trust em with a old micra:wack:

[Jez]

You can get the cables here: www.plmsdevelopments.com - I've not got any in at the moment. Or you could see if another local member will lend you one.