Author Topic: Runnning rich with Mustang injectors (Read 8108 times)

fiftytakedowns · « **Reply #15 on:** June 01, 2010, 11:52:45 PM »

Quote from: flyinglizard;93126

Try changing the air door position. Add about 3-5 clicks of tension to the coil spring.
Maybe you could lean it with the airtemp sensor or HOH temp sensor. It would need to read about 20% hotter than real.
I would do the air meter thing first, followed by the air temp sender( In the AF meter), than the water temp sender,as it is under the intake. Look in t he book to see how much resistance value to change .
Ps I foregot, there is a air bypass screw under the plug on the AF meter. Maybe you can get some leaner by opening that up. You have to pull out the plug, ( soft lead). back out the allen screw. This only affects the very low end of rpm. MM

Thats what that little screw does? Whoaaa!

spanish_pants · « **Reply #16 on:** June 06, 2010, 11:15:05 AM »

What seemed like such a simple modification has become more complicated than expected.

I�m going to ask around the spanish forums if anyone has an IS with cat and o2 sensor. Someone is always parting these cars out, with some luck i may be able to get the parts i need. If i can�t, then old injectors get a cleaning and go back in.

Thanks to everyone for the replies!

flyinglizard · « **Reply #17 on:** June 06, 2010, 09:58:58 PM »

They are a small difference. Try the small adjustments offered above first. There should be enough to get back the range that you need. IMHO.

PumpItUp · « **Reply #18 on:** June 07, 2010, 04:25:23 AM »

bro think about it... why should the car run really rich if you just swapped injectors for newer/better technology at almost the same flowrate.. it's probably something out of order.
and if it is indeed a flowrate problem (with not having an o2 sensor to adjust) and my understanding is correct (higher flow rate actually results in more lean, lower = more rich) then why not get the 22# ones.

anyways you don't need a cat or new exhaust pipe, just weld a $30 bosch o2 sensor in. it's not that hard or expensive. muffler shops are cheap

spanish_pants · « **Reply #19 on:** June 07, 2010, 10:22:25 AM »

Quote from: PumpItUp;93329

bro think about it... why should the car run really rich if you just swapped injectors for newer/better technology at almost the same flowrate.. it's probably something out of order.
and if it is indeed a flowrate problem (with not having an o2 sensor to adjust) and my understanding is correct (higher flow rate actually results in more lean, lower = more rich) then why not get the 22# ones.

anyways you don't need a cat or new exhaust pipe, just weld a $30 bosch o2 sensor in. it's not that hard or expensive. muffler shops are cheap

It�s a euro spec car with no cat from the factory that ran a little lean before the injectors went in.
I was just going to have the O2 sensor welded in and put in an ECU from a car that came with a cat. If i do this it should also allow me to run the MarkD chip i�ve had sitting in a box for two years...i think :p

PumpItUp · « **Reply #20 on:** June 08, 2010, 03:50:49 AM »

oh i see, a parts car that came with one. i thought you were actually going to put a cat on your pipe, a 20 year old one

spanish_pants · « **Reply #21 on:** June 08, 2010, 05:58:14 AM »

Quote from: PumpItUp;93355

oh i see, a parts car that came with one. i thought you were actually going to put a cat on your pipe, a 20 year old one

I�m going to keep it as simple and as cheap as possible, so no cat.

My friend tells me that his IS has a catalytic converter but no O2 sensor...weird. Maybe the O2 sensor was a North American addition to meet emission standards?

tjts1 · « **Reply #22 on:** June 08, 2010, 10:45:08 AM »

Quote from: spanish_pants;93358

I�m going to keep it as simple and as cheap as possible, so no cat.

My friend tells me that his IS has a catalytic converter but no O2 sensor...weird. Maybe the O2 sensor was a North American addition to meet emission standards?

These cars were built in the era where europe was just waking up to emissions controls and the EU hadn't standardized requirements across all countries yet. California cars have been required to have some kind of cat since 1972 but the rest of the US didn't catch up until the late 80s. I wouldn't be surprised to find all sorts of weird combinations over there depending on where the car was originally sold.

spanish_pants · « **Reply #23 on:** June 10, 2010, 02:14:58 AM »

Ok, i think i may have found what looks like the cable for the O2 sensor...it was behind the sofa the whole time!:D

Seriously now, it comes out from behind the plastic wiring harness cover and rests on the battery tray. From looking at pictures of the Bosh O2 sensor wires, the receptacles appear the same.

PumpItUp · « **Reply #24 on:** June 10, 2010, 03:42:44 AM »

which one are you going to buy? our 'oem' bosch is something like $160, which is almost as much as a fancy wideband (or so i've heard). someone on here said the cheapest bosch option was for the ford probe ($30) but only had 1 wire instead of our 3. i don't know what the extra ones are for, all the cars i've meddled with had a single wire. could someone explain why they charge different prices for o2 sensors for different cars, (when they're both econoboxes using the same 2 decade old technology)

bmwconnect · « **Reply #25 on:** June 10, 2010, 06:35:52 AM »

Quote from: PumpItUp;93404

which one are you going to buy? our 'oem' bosch is something like $160, which is almost as much as a fancy wideband (or so i've heard). someone on here said the cheapest bosch option was for the ford probe ($30) but only had 1 wire instead of our 3. i don't know what the extra ones are for, all the cars i've meddled with had a single wire. could someone explain why they charge different prices for o2 sensors for different cars, (when they're both econoboxes using the same 2 decade old technology)

The four wire sensors come with a on board pre heater and also keep the sensor at a functional heat range until the car is fully warm

ground
signal
heater +
heater -

spanish_pants · « **Reply #26 on:** June 10, 2010, 07:31:31 AM »

There are a few options available for my car ranging from 71 � to 120 � and made by Bosch, Walker and FAE. I�ll go with Bosch since it�s more economical and it�s a name i recognise.

http://www.oscaro.es/lista.asp?ID_GENERIC_ARTICLES=3922&ID_OSC_TYPES=14523&ID_OSC_LEVELS=202