2003 Rav4 Petrol (1998Cc) Obd P0300 &p0301

[rumtop]

Hi

I have been investigating a Cylinder No 1 misfire.

Yellow engine warning light constant or flashing

Engine starts no problem but idles a little lumpy

When driving there seems no loss of power

So far I have replaced air filter and all spark plugs.

I have also swapped cylinder No 1 with cylinder No 2 fuel injector.

I have also swapped cylinder No 1 with cylinder No 2 ignition / coil module.

I have cleared all codes but still get obd P0300 &P0301.

I want to try replacing ignition lead to No 1 spark plug but i have been unable to source a replacement, anyone know where I can get one from??

Any other ideas regarding this fault would be a great help.

Many thanks

Phil

[igormus]

first thing to do is have it de-coded

regards

[rumtop]

Hi Igormas

Thanks for reply

And yes I have cleared all codes (I have cleared all codes but still get obd P0300 &P0301.)

NB

The ignition lead to Spark plug one is the wireing harness to the ignition /coil module

[anchorman]

OK Phil - 'give up, what model is it?

[Davrav]

OK Phil - 'give up, what model is it?

I'll guess at 2003 Rav4 Petrol 1998Cc

[anchorman]

Might be just with a 4 number code........

[Davrav]

Might be just with a 4 number code........

I was going by the thread title..................................

[rumtop]

Hi

Yes a 2003 Rav4 Petrol 1998Cc

Not sure where to go now, checked harniss as much as possible today.

Reset /cleared all the codes again just to make sure

P0301 code returned after a few mins of engine running ,

missfire cylinder No 1 and engine still lumply on idle as you would expect .

[anchorman]

Must read slower!

If you've swapped all the components and the mis has stayed with No1, you need to do a compression test. Just make sure there are no leaks around the inlet manifold. Spray some WD40 around it and see if it revs up/smooths the idle out.

http://www.ebay.co.uk/itm/PETROL-ENGINE-AUTOMOTIVE-COMPRESSION-TESTER-KIT-DUAL-SCALE-GUAGE-TWO-ADAPTORS-/150763546549?pt=LH_DefaultDomain_3&hash=item231a3527b5

[rumtop]

Tks for reply anchorman

[rumtop]

Update

Orderd the compression tester from eBay.

When I have run the tests i will update