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3.0 adjust timing?

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#21 ·
Also need to be careful when disconnecting any of the sensors. The plugs are very fragile. I have two different intake setups for my 3.0. One with the stock airbox, with it's own airflow sensor, to install to pass the smog regs. and another whole setup to use with a long cold air intake to run most of the time. Our local regs here prohibit any modifications unless they have a C.A.R.B. approved number attached. Mine is one of the non-approved type. ...J.D.
 
#22 ·
Brucenc1 said:
what size engine.. I have 3.0 that would not idle bcause of a crack in vacuum line,, would run when cold..but after warms up the computer kicks in and just dies when you take foot off gas.. do you have a map sensor on it by air filter that could have intermittant wire.. and never use a cleaner on one.. I tried cleaning one and chemicals mess with the sensitive hotwre in MAP or MAF sensor
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FYI, you CAN clean a MAF sensor...there are a coupla brands of MAF sensor cleaners on the market, such as CRC that are safe to use.
 
#23 ·
I am wondering if this guy got his problem sorted out. Hate it when you follow a thread for a couple of pages, put your imput it, then get no feedback. ...J.D.
 
#25 · (Edited)
Yes, we are all busy. Even an old retired guy like me. It is helpful though to provide feed back when you have the time. We all learn for the shared experience. My Eclipse problems are getting pretty much solved for now. The car has now passed it's state smog inspection and is again licensed. It was last registered in 2018, so it was down for a long time. I need to now start focusing on getting two of my motorcycle fleet up and running before the summer riding season and home repairs take over in the summer months. I had some illness and depression for a few years so some of this stuff kind of got out of hand. Doing a lot better these days. :)...J.D.
 
#26 ·
Good to hear you are back on top of things J.D... How do you find time to ride motorcycles when you have that fine Eclipse in your driveway... I had a bicycle that sat on my balcony for the longest time. I finally gave it to a fellow in my building that is less fortunate than me. They did away with the smog test here in Canada. When we Canadians first put our cars on the road we must pass a smog test plus a safety check and then after that, we are good to go. No more smog tests every year. Once a driver reaches 80 years of age he/she must take a road test to see if they are capable of driving safely. My buddy Joe is 98 years young and he still drives like a teenager...A little hard-on-the-go pedal... He's a cranky old fart but I enjoy the stories he tells about yesteryears.
 
#27 ·
Finding time for anything is one of my biggest challenges. I am 76 and still have my motorcycle license. Riding motorcycles is not for everyone, but it is FAR different than bicycles. I own 3 British bikes. The last few years I have started using the winter months to get my mechanical things in order. I have a heated garage and I spend time servicing and repairing mechanical things. I also have a mini-machine shop set up out there to make some small parts. In the summer I have two houses to care for. Our smog inspection is semi annual. It is a pain in the neck, but it is required to license any car except very old stuff. ...J.D.
 
#28 ·
I use to ride motorcycles myself J.D... I had a 1951 Pan Head 1372 cu-in... a 1968 Triumph Daytona 500 Twin Card and a 1966 BSA 650 Thunderbolt... The Pan Head and Triumph were both show bikes. The only thing I ever won was the best display with the Pan Head... It was partially disassembled so I set the parts around the bike with some shop rags, tools, and a repair manual ... A long time ago my ex would get mad when I brought out the photo album of those bikes and old girlfriends so one night we had a bonfire in the back yard. To show her how much I cared for her I threw the photo album in the fire. Now I don't have my memories or the wife... I can't remember which was the best ride...the Harley, the Triumph, the BSA, or the Ex... :ROFLMAO::ROFLMAO::ROFLMAO:
 
#30 · (Edited)
Takuache said:
Also, I was thinking, on a tbi sbc, there are 2 temp sensors, one to adjust afr's and one that goes to the gauge. When the sensor that controls the afrs on a small block go bad, the ECU thinks it's -80, you can still get it to start but it definitely dumps fuel. Are these cars the same way? Could it be dumping fuel because of a bad temperature sensor causing a miss because it could be so rich? and not allowing it to start?
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Yes, the 3g has two coolant temp sensors, one for the ECU and one for the gauge, and the ECU defaults to a safe number if the coolant signal is lost. If it were me, I'd break out the factory service manual at terstone.com and go through every item that provides an input to AFR, and confirm it's working correctly. Most of them have test procedures in section 13A. I'll attach a picture below.

Where possible, I'd also test the sensor as part of the system, to make sure you don't have a good sensor but a damaged wire. For example, you can test the coolant sensor by putting it in hot water and measuring the resistance. But you can also connect a scan tool and read what the ECU thinks the coolant temp is. Which means you need to try a different scan tool, or get your OBD port working.

Also, there's always the possibility that you have a timing problem. It's rare, but possible for the crankshaft reluctor wheel to come loose from the crankshaft pully. If it reengaged it can be in a different position so that the engine is out of time. So you'd have sparking, but it wouldn't be sparking at the right time and wouldn't run properly. I personally think it's much more likely that you've got a bad AFR, especially if the engine is "dieseling." But it might be worth checking the crankshaft reluctor just to make sure.


Image
 
Discussion starter · #31 ·
WhiteSpyder said:
A little further information. The MAF is part of the base calculation needed to make the engine run, It is a "direct acting" sensor. That is, the greater the signal, the more fuel it calls for. So if the MAF were not connected, or not in the air stream, the result would be no fuel or at least a very lean condition. The air intake also cannot have any air leaks. The PCV has to be connected as well. These problems will dilute the signal and can, theoretically cause a lean mixture. This is part of the system that sets the base mixture. Along with the O2 sensor in the exhaust, the Absolute Manifold Pressure Sensor, the throttle position sensor, (and maybe more) the computer calculates the base fuel mixture. This is then modified if the down stream O2 sensors detect the mixture is a little off. And that is the SHORT explanation, to the best of my ability to explain it. Anyone want to add to this ? ...J.D.
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First thing I bought was a maf sensor, car quest warrantied it out for me.
 
Discussion starter · #35 ·
I know it took a while but I finally got to turn some wrenches on her, she was in time, my dad told me to replace the oil pressure sensor and that fixed it, idk how tf that changed anything unless if it goes bad and reads 0 as a safety feature
 
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Takuache
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