Brought home for the first time.
08-09-2013, 02:33 PM
#77
Advanced
Thread Starter
I don't understand - aside from the EZK and certain segments of the fuel lines I have tested, bought or replaced everything almost everyone has suggested on this thread. I bought two MAFs and a spare fuel brain and borrowed two more and borrowed an EZK. I have had them check all the wiring like four times. They checked the intakes for vacuum leaks and replaced a seal they found that was losing pressure. The coils tested fine and even their tester coils didn't change anything. I did the major service that is supposed to be the standard.
What am I not doing that was suggested?
What am I not doing that was suggested?
Last edited by ryalex; 08-09-2013 at 03:36 PM.
08-09-2013, 03:16 PM
#78
Drifting
Well to start at the beginning you should have bought the manuals on disk and consulted them before doing anything. If you had, MOST LIKELY, you would not be in this situation. They specifically warn against welding in regards to brains.
Next, you would not have paid pricey grease monkey's to clean and reinstall old fuel lines, you would have bought new ones and installed them.
It is your choice to do as you please, your money and your car, but for all the labor you have paid for you could have replaced every item in the electrical system with factory new and still have a lot of money left over. Some of us know a lot about these cars, from our own mistakes, reading, and work. These cars are difficult to maintain and tricky to troubleshoot. Paying others who do not know them inside out is usually not a good idea.
I don't care how many brains you have paid for, ASSUMING you looked at what they were installing at the muffler shop, the first thing to do after it went bad at the muffler shop where they welded parts on (at least that is what I understand) was get the 3 main electrical items from a known well functioning car. See them work in 1 car, 10 minutes later see if yours works with those 3. If not then no money wasted on brains and go on to the next item in the checklist.
You have paid for testing, which may or may not be done right when you could have replaced these sensors already more cheaply yourself.
Have you inspected/replaced the harness even where it is bundled and covered?
Have you inspected the engine electrical panel thing?
Have you inspected the Central electrical board in the passenger footwell changing all fuses and relays?
Have you inspected/cleaned all the ground points?
I would NOT trust hired grease monkeys to do these things, they don't care if you can't drive.
The 2 biggies were not swapping out all 3 at one time from a known good source and keeping old fuel lines. Successful, long, enjoyable 928 ownership is a hobby that is fun and means a lot of learning and some work.
Edit: what exactly was put on for an exhaust system?
Next, you would not have paid pricey grease monkey's to clean and reinstall old fuel lines, you would have bought new ones and installed them.
It is your choice to do as you please, your money and your car, but for all the labor you have paid for you could have replaced every item in the electrical system with factory new and still have a lot of money left over. Some of us know a lot about these cars, from our own mistakes, reading, and work. These cars are difficult to maintain and tricky to troubleshoot. Paying others who do not know them inside out is usually not a good idea.
I don't care how many brains you have paid for, ASSUMING you looked at what they were installing at the muffler shop, the first thing to do after it went bad at the muffler shop where they welded parts on (at least that is what I understand) was get the 3 main electrical items from a known well functioning car. See them work in 1 car, 10 minutes later see if yours works with those 3. If not then no money wasted on brains and go on to the next item in the checklist.
You have paid for testing, which may or may not be done right when you could have replaced these sensors already more cheaply yourself.
Have you inspected/replaced the harness even where it is bundled and covered?
Have you inspected the engine electrical panel thing?
Have you inspected the Central electrical board in the passenger footwell changing all fuses and relays?
Have you inspected/cleaned all the ground points?
I would NOT trust hired grease monkeys to do these things, they don't care if you can't drive.
The 2 biggies were not swapping out all 3 at one time from a known good source and keeping old fuel lines. Successful, long, enjoyable 928 ownership is a hobby that is fun and means a lot of learning and some work.
Edit: what exactly was put on for an exhaust system?
08-09-2013, 03:50 PM
#79
Drifting
Wow, you have done a lot and don't let other get you down.
Fuel lines get a lot of attention around here because the results of failure is so dramatic... yet often the drama occurs after incorrect repairs, in improper connections or hose that failed after being jostled. No sense in worrying about fuel lines on a car that isn't running correctly. However, I would keep an eye and a nose out since a lot of work has occured in, on and around them.
The loss of power and list of items already replaced is perplexing. What strikes me the most is it ran great, then exhaust was changed, and now it runs like ****. As an outsider looking in, I'd drop the exhaust and see if revs normal with open headers (LOL... wearing ear protection). Maybe one of the monkeys left a banana in your tail pipe
Don't recall what year you have, but if an ST2 works on it... it would be interesting to use the monitoring systems for diagnostics. Maybe something like the TPS switch (even thought it is moving, clicking, switching signals)... perhaps all the brains see's is "idle" and hence never coming off the idle map.
Edit... I see you mentioned that the TB and WP was serviced.. was this before or after loss of power. Mentioned is was "off a tooth"... CAM timing is adjustible and could have been set when it was off a tooth (although, not sure how close). Anyhow, I wouldn't rule this out without first knowing more.
Fuel lines get a lot of attention around here because the results of failure is so dramatic... yet often the drama occurs after incorrect repairs, in improper connections or hose that failed after being jostled. No sense in worrying about fuel lines on a car that isn't running correctly. However, I would keep an eye and a nose out since a lot of work has occured in, on and around them.
The loss of power and list of items already replaced is perplexing. What strikes me the most is it ran great, then exhaust was changed, and now it runs like ****. As an outsider looking in, I'd drop the exhaust and see if revs normal with open headers (LOL... wearing ear protection). Maybe one of the monkeys left a banana in your tail pipe
Don't recall what year you have, but if an ST2 works on it... it would be interesting to use the monitoring systems for diagnostics. Maybe something like the TPS switch (even thought it is moving, clicking, switching signals)... perhaps all the brains see's is "idle" and hence never coming off the idle map.
Edit... I see you mentioned that the TB and WP was serviced.. was this before or after loss of power. Mentioned is was "off a tooth"... CAM timing is adjustible and could have been set when it was off a tooth (although, not sure how close). Anyhow, I wouldn't rule this out without first knowing more.
Last edited by auzivision; 08-09-2013 at 04:15 PM.
