How to Clean Fuel System?

[Klobbersaurus]

Originally Posted by dohboi

I have PAID mechanics to diagnose but they can't find the issue, suspected different things, and proved their theory wrong when my car did start running normal for a little while when i used lucas oil treatment.

I paid the dealer $1600 to diagnose it only to tell me "i don't know, you can start by putting back in stock spark plugs, even though your plugs are good, you could try that, and also do a valve adjustment and it might be your ecu, I don't know"

And I got the spark plugs put back oem spec spark plugs even though my old ones were still good. As well had the valves checked, they were within spec.

Dealership sucks, paid them all that money to say i don't know, or it might be the ecu, we won't know til we replace it and if its not, then you still have to pay for it and labor. And then we will start guessing other parts to replace.

Its not like I haven't tried, I'm just sick of wasting money for no results

which dealership and which mechanics, where they all just guessing? any mechanic could scope it during idle to see if the spark plugs are working well or not by looking at the firing line, i say you got ripped off pretty bad if you paid $1600 and got nothing out of it, we charge $150 and usually figure out the issue by then unless we need tear down time or the issue is intermittent, then the cost would go up but not by much, any mechanic can guess and maybe get it right, i see guess work all the time, most dealership guys just replace parts and hope things work, it takes a good diagnostician to diag an issue and stand behind their work,
if you wanna come to my shop, let me know, im sure the techs would love something like this, we just did DRL on a 06 Ford GT that no one in the lower mainland would even touch

[ncrx]

i bet u haven't checked if the TPS is out of whack

[lexluthor09]

Originally Posted by ncrx

i bet u haven't checked if the TPS is out of whack

True, sometimes often mislooked, there's a reset procedure for that somewhere.

I was just gonna say what Klobbersaurus said. I'm surprised that no one could hook up a scope to see what's going on with the ignition. At least that way you could cross that out and on top of that run a current ramp test on the pump to see if it was good or bad.

I guess that's why everyone tells me to not go to a dealership for my apprenticeship, I'd just learn to guess =P

Then you'd only be left with air and timing as the only variables left. (If all others were good).

[Puck Luck]

Originally Posted by lexluthor09

I guess that's why everyone tells me to not go to a dealership for my apprenticeship, I'd just learn to guess =P

just be happy to happy to get an apprenticeship anywhere whether its a dealership, canadiantire or any independent. Once you get your ticket you can go where ever you want. Indy shops may see dealers as guesser's, but in all fairness, dealer's see indy's as butchers License to guess or license to butch....tough choice

but with the op's original problem, he's already seen numerous mechanics about it. Dohboi, sorry but i don't think you're going to get useful info over an internet forum

[godwin]

If you have an intermittent problem and you want to take it to any shop. ALWAYS request a ride along (point out the problems to them).. these days all the dealership's diagnostic computers are portable ask them to bring one along.

I mean eg for BMW OPS you can see real time fuel pressure.. which makes pin pointing much easier.. especially your car is relatively new.