2.8v6 Misfire

[POMPEYFAITH]

Hiya Guys

 

I have a 1996 Galaxy 2.8 v6 ghia which has developed a misfire after i replaced the thermostat and housing after i done this she used to run ok until i stopped then had no idle so i changed the spark plugs and ht leads now she does idle although roughly and when driving sometimes she runs ok and then misfires quiet eratic i also noticed today that she smells like rotten eggs could it be headgasket if so any special tools req as ill do it myself because the age of car does not warrant a

[tin2.3]

hi,

check oil dipstick for cream colured gunk on dip stick, all so under oil filler cap.

it may be worth getting a compresion test,is the v6 the same engine as mk3 granny?. from what i can rember no special to change h/gasket

rotten egg smell could be the cat as they smell of rotten eggs so i've be told.

hope this helps.tin2.3

[seatkid]

Rotten egg smell is unburnt fuel being cooked in cat (Hydrogen sulphide). You are not firing on one or more cylinders. Coil pack problem. Extended use of the engine with a misfire will damage the cat.

[sepulchrave]

....is the v6 the same engine as mk3 granny? from what i can rember no special to change h/gask

 

Just about the only thing this engine has in common is that it has six cylinders, they couldn't be much more different!

 

 

Rotten egg smell is unburnt fuel being cooked in cat (Hydrogen sulphide). You are not firing on one or more cylinders. Coil pack problem. Extended use of the engine with a misfire will damage the cat.

 

This is the correct answer.

 

I can't believe the search function has failed to confirm this for you!

 

Head gasket failures on VR6's are extremely uncommon, it takes really systematic abuse and persistent stupidity to blow one.

[POMPEYFAITH]

Sepulchrave

 

Idid try the search function but it returns no results for me ? Also i have a s/n with many posts i cannot access under Galaxychap i lost the password and the lost password function did not send me a reset i have emailed moderators but not no responce so had to create another account.

 

My suspiscions was the coil pack as i said in the original thread but i wanted to confirm this so asto not spend money unnessesarily

 

Regards

 

Pompeyfaith aka ( Galaxychap)

[POMPEYFAITH]

Ok next question where is the cheapest place to source a coil pack

 

Regards

 

Pompeyfaith

[sepulchrave]

Ok next question where is the cheapest place to source a coil pack

 

Regards

 

Pompeyfaith

 

http://cgi.ebay.co.uk/IGNITION-COIL-GALAXY...86.c0.m14.l1318

[Stevoo]

what part of south you from, if ur local to london i can read ur ecu for any errors.

[POMPEYFAITH]

stevoo I'm way down south just of A3M at Havant maybe there is someone nearer to me that can read the ecu,but thanks for the offer much appreciated.

 

Regards

 

Pompeyfaith

[Stevoo]

Ok mate no prob. hope you sort it out.

[sepulchrave]

stevoo I'm way down south just of A3M at Havant maybe there is someone nearer to me that can read the ecu,but thanks for the offer much appreciated.

 

Regards

 

Pompeyfaith

 

Dude, as I have stated numerous times reading the ECU will NOT help you isolate this fault.

 

The entire HT circuit consisting of Sparkplugs, HT Leads and Coilpack are completely outside the ECU's sphere of diagnostics. Once the ECU sends the signal to the coilpack to fire the plugs it assumes that it's been done and that's that.

 

The vast majority of faults the ECU can detect are simply open circuit or a resistance value lying outside reference parameters e.g. MAF, Temperature, TPS etc. these components can still be faulty in giving wrong values but if they're not out of spec then the ECU can't tell you that anything is wrong e.g. elderly Lambda probes.

 

Replace the coilpack, I bought one of these from ebay a year or two ago and paid more than that, and it's been fine ever since.

 

If it's the original Coilpack it'll be knackered. End of.

[MrT]

I know the Mk2 uses a different coilpack system of one per cylinder, but when one of mine failed, it brought on the warning light and the error was detected as "misfire cylinder 2".

[sepulchrave]

I know the Mk2 uses a different coilpack system of one per cylinder, but when one of mine failed, it brought on the warning light and the error was detected as "misfire cylinder 2".

 

Not just a different ignition system, a completely different cylinder head, injection system and engine management system.

 

In fact it doesn't have much in common at all, the only consolation is that the 'pencil' packs fitted to these engine are even less reliable than the old 2 way 3 pack system with leads which are fitted to our old Mark 1's. :lol:

[MrT]

Not just a different ignition system, a completely different cylinder head, injection system and engine management system.

Which is what gives it far more power whilst being more economical.

[POMPEYFAITH]

Ok Guys

 

New coil pack fitted Sorted cant complain as the last one i sealed with epoxy resin which lasted for 3 yrs yes i know i should of looked there first but i had it off to change the thermostat and it looked fine no cracks etc i guess it must of broken down inside. funny thing though shes got more poke now than the day i brought he 4 yrs ago.

[sepulchrave]

Hallelujah, another convert! :)