When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Hi all,
I would like some opinion on the below if possible please:
I have a 1999 Xj8 X308 with 103,000miles that has stood dry stored for at least 4 years.
New fuel pump got her running and fault codes indicated a bad coil (which I replaced) and various MAF and O2 sensor related issues:
P0102 mass air flow circuit
P0112 intake air temp sensor 1
P0352 ignition coil B primary/secondary circuit
P1646 heated oxygen sensor control module Bank 1 open/shorted
P1647 as above bank 2
I decided to check the tensioner situation before embarking on a spending spree and found a huge chunk of plastic sitting next to the timing chain. These appear to be Version 1 tensioners which I’ll replace if it seems viable (See photo).
The engine ran beautifully for about 10 mins after firing up for the first time, then went into limp mode which was resolved by the replacement coil. Subsequently however, I seem to have lumpy running and a knocking from what seems to be lower in the engine and limp
mode back on.
I’m assuming the lumpy running could be the MAF issues but would this cause that kind of noise? Is it likely that the tensioners have deposited lumps into the engine and it’s now buggered? I’ll check the timing across the cams to make sure the chain hasn’t jumped.
I also have white deposits under the drivers side cam cover (other not removed yet), could this just be condensation (no heavy white smoke from exhaust) and it needs a good run to clear?
Thanks for any input.
Rob Milky deposits... condensation or HG? Tensioner Lump of plastic by timing chain.
Agreed Jim, but to answer the original question, probably condensation. Too many short trips.
Thanks, yes that does make sense having sat for so long....so I’ll change the primary tensioners, clear the sump and have a look at the fault codes to try and get it running properly.
FWIW if/when you do the tensioner replacement, don't forget the guide rails. When I did mine many years ago the quide rails were in worse shape than the tensioners.
FWIW if/when you do the tensioner replacement, don't forget the guide rails. When I did mine many years ago the quide rails were in worse shape than the tensioners.
it was a Journey, started with looking for safe place for Jack stands. The guys here talked,walked me thought it.
everything looks worse then it is when you do that know something.
happy to say the engine is Very Happy now.