Technical Tips > Electrical-Electronics-Air-Lighting-Guages-Security-Vacuum

87 Runs like a dog.

<< < (6/7) > >>

Vettech:
It's pouring outside and I can hardly hear myself over the din on the roof of the warehouse, time to do something else. Start car and run up for 10 mins with occasional rev up. Temps are as follows.
1=140, 3=240, 5=240, 7= 230  then 2=150, 4=250, 6=250 8=140 Ummmm!. Maybe that Gazza was on the right track - obviously 1, 2 & 8 are not firing or getting enough fuel, so I'll try a dose of something in the fuel to clean the injectors. Other scenarios (ie ECM is F#@@ed) I won't contemplate at this time. But just in case do "WE" know someone GOOD who can re-flash the Chip, that's someone we trust - I don't trust my babies most innermost parts to just any one. :banghead:

sabre:

--- Quote from: Vettech on February 19, 2014, 02:30:18 PM --- Other scenarios (ie ECM is F#@@ed) I won't contemplate at this time. But just in case do "WE" know someone GOOD who can re-flash the Chip, that's someone we trust - I don't trust my babies most innermost parts to just any one. :banghead:

--- End quote ---
Unlikely to be an ECM causing temp variation as the odd and even cylinders are in parallel on a L98. More likely to be crappy fuel. I made the mistake of putting an ethanol boosted 100 octane in my '88 and blocked 1 & 2 so badly it run super lean and had the exhausts glowing.
On the issue of plugs, I'd carefully pull them out as colour will tell you what's happening. Difficulty with thread is common if you have aluminium heads. Withdraw in part turns then screw back between parts to clear the carbon. They'll have to come out eventually and the longer left the tighter they'll get. Clean the threads well and reinstall with an anti-sieze.

Vettech:
Thanks Sabre.
It would be and to double check I redid the test several times with Batt Disc between tries, just in case there was a moving glitch - results much the same. Last night I remembered a trip Mal organized to  NULON - and wallah! - the goodies bag has a bottle of "Fuel System Cleaner" - this is a product I've never had much time for - so today I'll re-fuel and add the Cleaner. It will be an interesting test and I hope it will still save me removing the Plugs. :bag:

Sorry I'm a bit slow this morning - yes yes of course, "TPI" ~ the Injectors odd , even banks are all energised at once, so gunk or faulty injector is more likely than ECM. Good thinking 99.

Vettech:
WELL WELL WELL ! - I've now developed a new respect for wonder fixes in a bottle. Filled the tank and went down the Hwy, slowly it got better, stopped back firing, missing, by the time I got Picton Rd it seemed a whole lot better, went off Picton onto Menangle, even stopped at "The Menangle Store"  but his divers weights were too dear now - then came back to Minto. I do believe the problem is fixed. I suppose one should not try to over think small problems. :cheers:

After that run - all cylinders seemed to be around 260 Deg C.

VETTENUT:
Quote:"Maybe that Gazza was on the right track"

Wonder fixes in a bottle eh?

From the day that ULP was introduced onto the Australian motorist, there have been problems with gum formation on injectors, and deposits throughout fuel systems and upper cylinder areas. Techron was brought to Australia from Caltex's parent Texaco, on request from BMW and others, who had experienced the problems elsewhere in other markets. It was the first product of it's type released in Oz, and is still added to Caltex Vortex 98 petrol to help keep a clean system to stay that way. After 43 years in the petroleum business, I know the problem is real, and the fix is genuine.

What kind of pie is that you are eating Vettech? LOL.   :zip:

Navigation

[0] Message Index

[#] Next page

[*] Previous page