2.2 Direct Misfire Problems :(

[jonny180]

Hi, I am looking for some advice for my Vectra.
Basically I was travelling home from work Tues mainly sitting in traffic and when pulling away the car started to judder. The yellow spanner light illiminated so I pulled over and turned off the ignition. I then restarted the car which turned out the light but now the car keeps misfiring under load.

After reading through the forums I purchased some new plugs & coil pack which i fitted today but the car still does the same?

It idle's fine and drives ok at very low revs, but as soon as you accelerate above 3/4k it starts to misfire, ending up losing virtually all power.

The EML came on so I have plugged my code reader in and im receiving error p0303.

I dont know what next to try, so would appreciate any help.

Thanks
John

[Kcriyback]

I had the same problems.
I changed the plugs.
Took off the egr and cleaned it.
Also the fuel preasure pump got striped n cleaned out with oil change
And its running like new now.
Dont know if it will help


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[spennny]

Same symptoms as mine when the high pressure fuel pump went mate , have you had the regulator changed and what make is the HPFP on the engine, siemens or continental

Just to add mine through up a fuel reg fault when it was infact the pump

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[jonny180]

Thanks for the help, where is the egr valve located?

[rushy]

Its not the EGR mate its the HP pump on the Fuel rail, odds on its a Siemans and this will be the cause of your problem, its a very easy job to swop it over. The EGR by the way is on the side of the engine next to the battery box, its water cooled so if you unbolt it you will have to drain and refill the coolant system.

[kenp]

It could be either FPR or HP pump (or both). in the last year ive changed both.. as i same problems like you.

Only way to determin what fails is to have faultcodes read out, but sure sounds like the HP pump (takes 20 minuts to change.... and not even that long)

[jonny180]

Many thanks to all for the replies. I have just taken off the pump and cleaned out using some degreasing spray down the nossels. I did not have the correct torx socket to undo but even with this small clean, I have just driven 5 miles without no misfiring except if i let the revs past 3k. Does this sound like the pump for definate as I have just shed out 180 pound on coilpack and plugs and am looking at another 300+ for the pump.

[davidlewis24]

Many thanks to all for the replies. I have just taken off the pump and cleaned out using some degreasing spray down the nossels. I did not have the correct torx socket to undo but even with this small clean, I have just driven 5 miles without no misfiring except if i let the revs past 3k. Does this sound like the pump for definate as I have just shed out 180 pound on coilpack and plugs and am looking at another 300+ for the pump.

what is the make of the pump mate ?

[jonny180]

Siemens unfortunately

[kenp]

That sounds like the pump.. (i drove home 375 miles with a defect HP pump)

Seach the bay for cheaper Continental replacement..