Passat (B5) :: How Much Boost Without Running Too Rich / Lean
Jul 18, 2011
How much boost can you push on the stock turbo without it running too rich or lean?
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Jul 18, 2011
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Ford F-150 (2009-2014) :: 2011 - Hesitation From Idle - Missing Or Running Lean / Rich During Spin Up Of RPMs
I have recently purchased a 2011 F150 Ext cab with 3.5L ecoboost with 69k miles. I have no experience with these engines prior to now. I've always wanted a full size truck and after driving my 98 S10 for 17 years, I decided it was time for a new truck. I hope I made the right choice in going for the 3.5 instead of 5.0.
On to my question. I've noticed that the truck hesitates from a dead stop or anytime the RPM's are under 1k. It feels like its missing or running lean/rich during the spin up of RPM's. When I drive it hard, it does seem to subside for a little, and I've heard people say that they run better when run hard. I can attest to that, but is this hesitation normal for an almost 70k mile engine? I am getting 15ish MPG on almost all city driving since I have bought it, but I do expect that to change (job hunting and current commute is less than 2 miles each way).
The only time I get to open it up is when I go run errands out of the immediate local area or visiting friends and family. On one of those trips, before I noticed the hesitation, I attempted to accelerate from 60 to pass on the expressway and it bucked and resisted like a horse. It finally took off up to 80 and completed that journey with no issue but the check engine light came on for a bit. The check engine light went off when I shut it down and hasn't come back on since.
New ride: 2011 3.5L Ecoboost....
Golf VI R :: CEL With System Too Lean And Rich Fault Message
How can one get a too lean AND a too rich error, within 150 miles? I'm guessing the too rich code was what through the CEL last night. For reference, the only mod is APR stage 1. That will teach me to drive "spiritedly" with a Porsche Turbo S. (which sounded amazing at WOT btw..)
2 Faults Found:
000369 - Fuel Trim; Bank 1
P0171 - 001 - System Too Lean
Freeze Frame:
Fault Status: 01100001
[Code] ....
000370 - Fuel Trim; Bank 1
P0172 - 002 - System Too Rich - MIL ON
Freeze Frame:
Fault Status: 11100010
[Code] ....
Ford Excursion :: 2000 XLT - Runs Rich Or Lean - Hesitation When Warm
I noticed difference in smoothness of gas pedal recently, I have an sct x4 tuner and it shows the short term fuel is 1.25% on idle. Does it mean rich or lean?! And what is the solution for this symptoms!
2000 5.4l xlt
Note : cold start runs fine, goes hesitant when warm, furthermore I have changed the temp. Sensor....without any difference.
Passat (B5) :: Engine Codes - P1136 Running Rich At Idle / P1250 Low Fuel Level
I just had my check engine light come on and checked the codes and they were P1136 running rich at idle and P1250 low fuel level. My fuel level is 3/4 full and I just installed a K&N panel filter in the airbox. While I was installing the filter I also cleaned the mass airfow sensor and then cleared the codes. The codes have come back after 2 days.
View 4 RepliesFord Aerostar :: Erratic Idle - Air / Fuel Ratio Is Too Lean Or Rich For PCM To Correct
97 shortie. 3.0 245,000 miles. I've already cleaned the throttle body and the idle air control valve. Throttle position sensor reads 5 volts, good ground, and a smooth voltage increase from idle to wide open throttle and back down. Which of these codes is most likely to cause erratic idle? Mostly in the morning.
P0340 Camshaft position sensor.
P1443 Evaporative purge flow sensor.
P0401 Insufficient EGR flow.
P0171 Air/fuel ratio is too lean or rich for PCM to correct.
I doubt it's number 1, and number 4 seems too general to be any use. I'm leaning toward number 3. Seems I read somewhere that the tube from the exhaust gets plugged up. This started when I disconnected a plug from the blue air bag box to get rid of that beeping. Coincidence?
Ford Super Duty (1999-2016) :: Lean And Rich Code At Same Time
My truck threw a check engine yesterday, P1151 and P1152. What could be the problem? 04 f350 with 5.4 with 142,xxx on her
View 14 RepliesPassat (B6) :: 3.6 - Intermittent CEL And Running Lean
Got an intermittent CEL a while back and my indy took a look on Thursday. I don't have the codes, but he advised it was running a little lean and there was an issue with the high pressure fuel sensor. Replaced the sensor on 4/11, cleared the codes, ran the car for a few miles and no codes and no CEL. I put a couple hundred miles on the car with no problem, but on 4/16, the CEL returned. I'm dropping it off with my indy again tomorrow, but I'm assuming it's the lean condition again.
Plugs?
O2 sensor?
Injector?
Passat (B6) :: CEL Turned On - Car Running Too Lean
My CEL turned on about 2 weeks ago. I took it to autozone and they ran it, and it came up as that my car is running too lean. Would this have to do with my MAF sensor? Also, It seems that my car is also burning oil. I have a 06 passat 2.0T.
View 24 RepliesSonata NF (2006-10) :: Exhaust Running Rich And Popping When Ease Off The Gas
Here is a video of my sonata exhaust running rich and "popping" when i ease off the gas when in P/N (haven't driven it enough to recreate it on the street in gear). I also included a teaser pic of my plasti dip project which is almost done and ready for me to enter the Ride Of The Year.
3.3 V6 Hyundai Sonata Rich Exhaust Popping Sound - YouTube : [URL] ....
Celica :: 2001 Toyota GT Running Rich On Idle Only - Gross Polluter
My 2001 Toyota Celica GT was put through a smog test and it was running rich on the idle only. It has been tagged a gross polluter and so i finally got a code reader to try to diagnose why. When i plugged in the code reader it kept stating no codes. It does not have a check engine light on and has not had a tune up for a while now. I am in real need of my car now more than ever.
View 2 RepliesSanta FE SM (2001-06) :: 2.4L Engine Running Rough / Rich Smell All The Time
When firing up the engine cold it runs really rough, smells very rich all the time, even warmed up. No codes set, fuel trims are within 5-10%. I've replaced the front O2 sensor, swapped crank & cam sensors, Map sensor (have lots of spare parts) & I'm sure there was more things I've changed but can't remember. I have a snap on scanner and everything is within parameters.
I have not checked the EGR valve or solenoids yet. It's a 2006 Santa Fe 2.4l 5 speed, new timing belt & balance belt replaced when I dropped this engine in. Is there a common problem with these that I could begin looking for?
Ford Fuel System :: 1986 F150 - Engine Running Rich / Flooding?
My engine is running rich, flooding? My truck is a 1986 F-150 302 EFI. The engine idles rough, black smoke and soot comes out the exhaust pipes, and black soot on spark plugs. Symptoms seem to disappear if I throttle the engine and hold it, but as soon as I release the throttle the symptoms reappear and in most case causes the engine to die. These symptoms have just started a week ago. What the problem is.
Fuel injectors are cleaned and rebuilt. New plugs and wires. All new fuel pumps and filters. New air filters. New fuel pressure regulator. New dual function reservoir. New 3-piece timing set. New O2 sensor. New EGR Valve and sensor. New idle air control valve. New distributor, cap, and rotor. New ignition coil. New high volume oil pump. New alternator. New pcv valve. New knock sensor and air charge temp. sensor.
Ford Ranger / B-Series :: 1994 - Running Rich / Strong Exhaust Smell
1994 reg cab 4.ol 13ok.. my wife just got it, been doing some small things like replaced dome light, replaced cargo/third brake light, truck starts and seems to run ok. but i get a headache in it which i believe is carbon monoxide, has a leak or something? i text previous owner, he said he replaced 02 sensors, but didnt say if they were bosch or a good brand.. also trucks has a oil pressure and coolant temp gauge fitted on by the gear shift as the dash gauges for those functions are out. Does this mean the CTS may not be working and affecting fuel/air I do not know these trucks i only just found out what this strange silver looking thing was it is the IAC, I Believe, then there is this black plastic vacuum type cylinder by the passenger side firewall, what is that? and right against the drivers side fire wall is a small reservoir type thingy, is this something to do with ABS? i do have an ABS light on, was hoping it was the bulb out on the third brake light or something quirky like that no such luck its still on after starting engine. but i am concerned about this running rich/strong smell as we really cant take it far as is it, its dangerous, may have to get a smoke test? Just got the truck, trying to get caught up..
View 8 RepliesGrand Prix :: 1997 GT Running Extremely Rich And Pressure Build Up In Fuel Tank
I'm having this weird problem with my car, 90% of the time it will start to run rich, until it reaches normal temp, to the point that I can smell it coming out from the exhaust. LTFT is at around -15% and it seems to go down after cruising for some time but will go back to negative at idle. My first suspect was the FPR so I checked it and found no gas smell on the vacuum hose, then I decided to run the engine with the vacuum hose disconnected and see if any fuel would come out, 5 minutes later and it was still dry.
There is a chance that the MAF sensor is bad, I'm 90% sure it is, because it will sometimes read 2.9-3.1 gps at idle and according to the rule of thumb of 1gps per liter of displacement, it shouldn't go that low but I might be wrong about it; I disconnected the MAF and the smell was still there, today while driving it was reading 5.45gps (A/C was on) and the smell was still present; car also feels sluggish from time to time only at normal operating temperature (which I assume is because of it running rich).
There is also a vibration felt through the steering wheel only while idling in gear at all temps. Today when I got home and after I turned off the engine I heard a noise like water was running. It was coming from the car so I tried to find where the noise was coming from and it's from the fuel tank. I removed the fuel cap and lots of air came out (or sucked in?). I reinstalled the cap and pressure started to build up almost immediately! I have a video, which I'm sharing, so you can see what I'm talking about; I was even able to hear the fuel tank expanding because of the pressure inside, not sure if you can hear it towards the end of the video (when I put the phone under the car). [URL] .....
It also happened today that I was cruising and the engine hit the rev limiter after I stepped on the gas (WOT) to overtake another car. I immediately removed the foot from the pedal and gave it less gas and it acted normal, no slipping from the transmission at any other time. There is one more thing that I'm not sure about it. Every morning, the engine will sputter for 1 or 2 seconds after starting it but it will be fine for the rest of the day. I once tried disconnecting different sensors from the engine and the only one that seemed to make a difference (it didn't sputter) was the TPS.
Things done so far:
- I replaced the EVAP purge solenoid (P0441 was present) back in february.
- Rubber pieces at charcoal canister also replaced, old ones were rotted to the point my hands would look black just by rubbing against the hoses.
- Upper intake manifold was also replaced by me in november last year.
- New NGK spark plugs and OEM spark plug wires last december.
- Cleaned the MAF sensor with MAF cleaner, no dice. Used brake clean, no change. It's a reman Cardone from autozone, which tells us it's 90% sure it's broken.
- New Duralast MAP sensor back in 2010 because a mechanic broke the original.
- 10qts transmission fluid and filter replacement 2 weeks ago.
- Fuel pump was also replaced back in 2009 maybe, can't remember the exact year. The old one would start making some kind of a hissing noise after prolonged driving.
NO DTC'S PRESENT. I once checked Mode $06 data with a mid-level scanner I have (AutoXray EZ-scan 6000) and saw a test had failed, I think it said something about the MAF and EGR. IHaven't connected my fuel pressure gauge tester. Since I can smell it running rich, I didn't think it would be necessary. I'm thinking that there could be a problem with the EVAP system that's causing the excessive pressure in the tank but I'm not sure what that could be. Is there any chance that the pressure is also causing the rich mixture?
Ford F-150 - 1997-2003 :: 2000 - Truck Will Barely Move / Running Full Rich
I have a 2000 F150 4WD 5.4 running Extremely rich to bank one. The O2 sensors for bank 1 are reading lean(0-50 mV) Bank two is completely unaffected. New plugs in Bank one, 3 new coils in bank one, all pvc lines checked with good vacuum. Previous codes : P0171, P0301-3. The Truck will barely move. Would a small leak up stream of the O2 sensors cause this?
View 10 RepliesFord Super Duty (1999-2016) :: V10 F250 - Code P0172 - Bank 1 Running Rich
What may be the issue with my truck. Drove earlier in the day and hauled trailer. Ran fine. Got it home and once I unloaded trailer and went to start up truck again it died a minute into backing up. I tried to restart and turns over but dies in 3-5 seconds. Tried again a few hours later and next morning and same thing.
Pulled code and came up P0172- Bank 1 running rich. I had replaced the Mass Air Flow sensor a few months ago. Since it was still under warranty I went and got a new one in case that was the issue, but didn't fix. When I try to start it smells like gas. Sounds like fuel pump is coming on fine. Checked air filter.
Of course is still hooked up to the trailer and in a tight spot in the yard at the moment so anything basic/inexpensive I can try myself first would be great.
Ford 6.0L Power Stroke Diesel :: 2007 F350 Running Extremely Rich When Accelerating From A Stop
I have a completely stock 2007 F350 turbo diesel with 98000 miles that i just bought . When accelerating from a stop, it runs so rich that it will barely move and it accelerates very slowly . It burbles excessively and spews black smoke . It slowly builds rpm . As it builds rpm it runs slightly better and the black smoke turns into a medium gray the faster it goes . It takes around 20 seconds to reach 3000 rpm on level ground with the accelerator pedal half way down . Once it reaches 3000 rpm, it runs fine and hauls a_s but looks like it still smokes a little.
The temp gauge stays right in the middle and it does not run hot . It starts and idles fine. The check engine light is on but i have not read the codes yet and can't do that until monday. I have read that it could be an injector that is stuck open but do not know how to check for that. I am a vintage car mechanic and engineer but I know zero about newer computer vehicles and very little about diesels.
Ford Super Duty (1999-2016) :: 2002 F250 - P0171 Code Only / Coughing And Running Rich
2002 F-250 5.4l 4x4 ... I am getting a P0171 code only, with strong fuel smell. No P0174 code. So it has to be something effecting just the one bank? Sprayed engine with starting fluid, no charge in idle. Replaced upstream O2 sensor, no change. Truck was running fine, and then just started this all at once.
View 5 RepliesFord 7.3L Power Stroke (1999-2003) :: F350 Running Rich / Crank Very Long Time Before It Starts
I recently (in the last few months) have noticed my truck (1999 F350 duallie) seeming to be running very rich … I pull a 32' trailer with it and noticed on the art few trips the front and right side of the trailer covered with diesel fuel spots when I got home …. It also smells very rich when idling…. The last couple times I started it in the mornings it seems to crank a very long time before it starts …it still runs but its got issues evidently … it has these 3 codes :
P1280
P0475
P1670
The 1670 will clear , but the other 2 I can't clear, they are right back every time you turn the key on …
Mazda - Protege :: 1996 - Lean Running Condition
I own a 1996 Mazda Protégé with 128,000 miles. I had it in for a check of a sewing machine sound. The mechanic tested it and found, among things, a "lean running condition". What does that mean?
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