GTI 337/20th Anniversary :: Loss In Fuel Economy After A CAI Install
May 14, 2011
Noticed a loss in fuel economy after a CAI install??
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May 14, 2011
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Tiguan :: Terrible Loss In Fuel Economy - Bad Mileage
So, I had a catback Magnaflow exhaust put on my Tiguan a while back and ever since then my mileage has gone from a steady 28 highway to 15!!! its a crazy loss in fuel, and I brought it to the shop and they said there is nothing they can find....
My first thoughts are that the turbo is under boosting because of the amount of carbon build up on the exhaust tips....
Prius (Gen 2) :: Loss Of Fuel Economy After Electric Water Pump Replacement
After my electric water pump was replaced under the recall my mileage went from 45 mpg to about 30 mpg. Part of this might be due to new tires and cold snowy weather (CT !) but I have never seen such a drastic drop in performance (2005 Prius).
View 12 RepliesSubaru - Outback - Fuel-economy :: What Is Causing MPG Drop And Power Loss
My 2001 L.L.Bean Edition H6-3.0 is losing power & MPG on the fwy. Sometimes it will feel like something is holding it back or dragging. I've checked the brake calipers and they're not sticking, changed the air filter, oil & filter, transmission fluid, and still cannot find the problem. I've overfilled the gas tank and read this can damage the charcoal canister. Will a saturated charcoal canister cause a drop in power and MPG? What should I check out next?
View 10 RepliesHyundai - Tiburon :: Misfire / Power Loss / Hesitation / Poor Fuel Economy
I have a 97' hyundai tiburon, I have multiple misfires that are p301 302 304 and rich airflow. I have changed the coil pack, spark plugs and wires, and the MAF sensor. Basically my car doesn't accelerate fast or go over 40(max), it putters when i try to accelerate.
View 1 RepliesGTI 337/20th Anniversary :: Hesitation After Intercooler Install
Last week I had the Godspeen intercooler installed on my 05 Jetta GLI. I would say that since the install I have put about 300+ miles on the car so I would think that the computer has learned the additional air flow. I notice that if I'm cruising in 4th gear just below 3000 RPM's and punch it there is hesitation. It is quite noticeable because I have a full 3" inch exhaust so you can hear it hesitate for about a second and then kick in again and continue up the powerband. Do I need to get a good tune or has the computer just not learned it yet?
View 15 RepliesGTI 337/20th Anniversary :: How To Install Oil Pressure Gauge
I need to know how to install an oil pressure gauge...or what is the location on the oil filter flange where this thing gets installed...
View 5 RepliesGTI 337/20th Anniversary :: 2004 - How To Install Oil Pressure Gauge
I am wanting to install a oil pressure gauge to go along side my boost gauge in my double pod on top of my steering column, how to do this?
View 4 RepliesGTI 337/20th Anniversary :: Bucking / Limp / Hesitation After Clutch Install
I took my car in for a clutch install, everything was fine except the clutch slipping. I go to pick up my car and once the car warmed up it started bucking / limp mode while accelerating. Take it back to the mechanic and he thinks he didn't reset the throttle body. So he says that should be it and I pull away. Same thing. Leave it with him again and he replaces with "diag" coils and new plugs. Leave again, same thing. He tells me to get totally new coils and try that. I am thinking its a missed ground cable or messed up ECU or something. During all this not one code it thrown.
20th GTI 1.8T 6 speed, stock clutch, all stock
GTI 337/20th Anniversary :: Temporary Power Loss On Highway
So over the past couple months when driving on the highway I would notice that sometimes my car would lose all power and slowly coast to a stop, but then the power comes back on and I'm off after a few seconds. It happened again today and I notice when I do hit the gas when it decides not to accelerate my boost gauge shows that there is vacuum building up in the engine. It just doesn't make sense to me. Would my car be getting thrown into a limp mode? Or is it something to do with fueling?
View 4 RepliesGTI 337/20th Anniversary :: Coolant Loss - Won't Find Possible Leak?
I've had the car about 3 months now. It runs fine, never overheats, but I keep having to add coolant (every 2 weeks or so), but I can't see a leak anywhere.
I searched and found one guy that said it could be a bad expansion tank cap, and another that said it could be a tiny leak that only leaks when driving.
Anyway, when replacing my axle, I noticed this:
If that's dried coolant, where would that be from?
GTI 337/20th Anniversary :: Loss Of Power / Starts To Die At Idle And Hardly Turns Over
I have a 03 20th ae gti with about 84k just replaced the coil packs. driving on the freeway then power just goes away, press on gas and nothing. limp it off the freeway. Then it starts to die at idle and hardly turns over. car is pretty much stock. new clutch at 75k.
View 8 RepliesGTI 337/20th Anniversary :: Bog Down A Lot / Rough Running - Complete Power Loss On Highway
About three nights ago I had a complete power loss on the highway and the car began to bog down alot under throttle (and surge at points as well although with no boost). It also idled very rough/erratically. When I unplugged the MAF it cleared up right away; Idle was smooth and it ran without hiccup but in safe/limp mode so very tame (again, without boost really, gauge shows it stays in Vacuum and never passes "0" or goes into boost).
I scanned it this evening and got 2 misfire codes and a MAF code, along with a code related to traction control which I noticed had activated as a result of this and could not be turned on (by activated, I mean the light came on, disengaging T/C). These things make me think it is MAF related, especially because I have bolt down Hitachi coil packs so I do not think that is what it could be in relation to the misfire codes (which I think may be old and needed to be cleared).
Fast forward to last night: I can pretty confidently say my MAF is not the problem and I think I saved an unnecessary expenditure. I was able to meet a friend with a 337 as well and his MAF did not change my car at all and my MAF ran fine in his car so I think my problems are something else. Although with the MAF plugged in my car runs very poor and unplugged it clears up and just runs "limp" (no boost and slow but stable) from what I tested this evening the MAF unit seems to not be the issue.
I think there must be a vacuum leak of some sort between the MAF and the engine which allows more air in than the MAF signals when plugged in which causes the issue. Also, I know a common thing to think is "coilpacks" but I have bolt down Hitachi coil packs so I would imagine that would eliminate those from being the failure they tend to normally be. Agreed ??
GTI 337/20th Anniversary :: Have Fuel And Spark But 1.8t Won't Start
I have a perplexing problem and I'm at wits end trying to figure it out. I have an 03 GTI 1.8t 20th. The car has been running great until today when I replaced a few bolts with the front bumper and replaced a motor mount bolt on the passenger side mount. Everything was great until I did the work on it. I figured I had bumped the cam position sensor so I swapped it out for a new one and nothing still. I have verified I have spark and I definitely have fuel as it keeps drenching the spark plugs. I have cleaned the spark plugs and tried starting only for the car to violently sputter and misfire. No codes are being recorded and nothing else has been touched.
View 9 RepliesGTI 337/20th Anniversary :: Can't Get Fuel Pump To Turn Over
Alright, so upon starting my car earlier today, i was unable to get the fuel pump to turn on and send fuel to the motor, car will crank over and want to start, theres just no fuel getting to it. I'm going to replace the fuel pump relay and clean up the throttle body to cover the simple stuff. also i recently just installed a 3 inch down pipe, could have the o2 sensors shorted as a result of a bad knock?
View 2 RepliesGTI 337/20th Anniversary :: Fuel Gauge Does Not Go Full
I don't think this is normal since my 01 2004.5 GLi go all the way... Note that i took this picture right after i "full" fueled the car (Just drove 2.3miles)...
View 24 RepliesGTI 337/20th Anniversary :: 2005 VW GLI Fuel Smell When Turned On
My 2005 VW GLI has a fuel smell when I turn on the car ... I think it might be running rich or something I don't know.. All I know is I think the fuel and air mixture is not right ... What should I do? what should I check? will a re-tune do anything?
View 2 RepliesGTI 337/20th Anniversary :: Fuel Pump Not Priming - Car Won't Start
Ok, car won't start. fuel pump not priming. tested the fuse, no power coming to it, fuse is good. even used another fuse. my flex connection on my dp blew out, rusty had a leak there for a while. in any case patched it up McGyver style till a new dp arrives. I backed the car off the ramps and shut it off to clean up. when I went to test drive it fuel pump wasn't priming.
View 1 RepliesGTI 337/20th Anniversary :: Fuel Cutoff When Tank Gets Less Than 1/3 Full
I am the original owner of a 337 with 292,800 miles, that's correct. I recently have had a fuel cutoff problem when the fuel tank gets less than 1/3 full. So I replaced the fuel pump and fuel filter thinking that would solve the problem. It still stalls with a low fuel tank. It runs fine with more than a 1/2 tank. I have a Vagcom and no issues there.
Mystified at what could be the cause. Possibly fuel pressure regulator or vacuum line, is there a check valve somewhere in the fuel system that could be sticking, or what about an issue with the EVAP system? By the way this car still looks great, has been to the track many times as well as autocrossed, and still has the original clutch. Way to go VW. My race car is a spec miata.
GTI 337/20th Anniversary :: 1997 Jerking As If Car Has No Fuel Being Pumped To The Engine
I have a 1997 GTI with 140K miles and standard transmission with a problem. I have taken it to a mechanic but to no avail. At random times, usually between 2nd and 3rd gear and sometimes in 1st gear, the car will jerk as if the car has no fuel being pumped to the engine. The mechanic told me that it could be several problems and recommended having the CO2 sensor changed. Since having the monitor changed the car was performing better but yesterday it died in traffic and did not start again for 30 minutes. At this point I do not want to pump any more money into the car before fully understanding the problem and potential solution. I also know that for a full diagnostic I will need to provide more information.
View 1 RepliesPrius C Fuel :: Fuel Economy Reading Resets Every Time Turn The Car On
Every time I turn the car on, the "from start" fuel economy reading resets to 15l/100k. After driving for a while it goes down to 4l/100k but then resets back to 15 once the car is turned off. Is there any way to get it to stay at what it finished at?
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