Jeep - Wrangler :: 2004 - Hard Start - Rough Idle - Getting P0505 Code?
Feb 27, 2011
My 2004 Rubicon has been having some idling issues. It idles kind of rough (+- 200 RPM) and is hard to start. I tried to start it recently and after 4 cranks, it started then the CEL came on, and has been on ever since. I have recently moved from Washington state to Houston Texas, and the problem starterd here in Texas. I checked the code and am getting a P0505 code. I had a mechanic replace the IAC valve, Checked for vacuum leaks, and cleaned the throttle body. The mechanic says the output from the main computer appears to have burned out, and needs to replace the main computer(for $1000). The mechanic can clear the CEL, but after turning the jeep off then back on it reappears. The mechanic says he verified the computer was the problem by installing a known good computer and it cleared the problem. Does this sound right to you? If my computer is bad, wouldn't my whole operation be affected?
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Few weeks ago.....Prius was showing the P0505 code .... Mechanic, ran diagnostics and determined it was dirty TB. Cleaned TB.....cleared the code (inspected PCV...hoses).
When I initially picked it up it was revving very high....so he hooked it back up to the scanner and did some type of "reset" for the idle (this cleared most some computer settings...back-up beep, radio stations, etc...). Everything ran fine for past 3 weeks...
Just last night..... started running rough again. What I noticed this morning ... Started it up and it ran very rough til the auto shutdown after warmup (no warning lights). Then....when I started driving slowly out of the lot...it ran "rough upon acceleration"...... Then fine at cruising speed. Same behavior at every light....rough acceleration.... fine once up to speed. Just started it up again and same behavior.....(does not die...just very rough).
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My check engine light has come on twice now and I'm getting a p0505 code, idle air control malfunction. It seems as though there could be a couple causes for this. All my hoses seem tight, so the cheap fix seems out of the question. What could the other causes be, and more importantly, about how much for a shop to fix it. I have a 2006 with 155,000 miles on it.
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Having trouble with my '00 Jetta 2.0 A/T w/ 98K miles. Had the water pump replaced @ a year ago (for the 2nd time, the 1st replacement died after <15K miles.) The car has had issues with rough idle when started, especially with a cold engine, since before the 2nd water pump. I've replaced the coil pack, thermostat, and coolant temperature sensor in the recent past in addition to the water pump & timing belt.
The gas mileage sucks, and when it's idling rough it doesn't "idle up", & will stall if the gas pedal is pressed with 30 secs. of starting. Otherwise it seems to run fine. The coolant temp. sensor was replaced after a CEL indicating it was bad. The CEL went off after it was replaced, but it's now throwing a P1296 Cooling System Malfunction. I have noticed the temperature gauge fluctuates instead of staying around the "middle" since the 2nd water pump replacement, and will run "colder" in colder weather. Since spring is here, the temp. gauge stays around "normal", or the middle.
Some research online says thermostat OR coolant temperature sensor. Since the gauge registers normal now, I'm leaning towards a bad temp. sensor...?
Does the hard start/rough idle and the cooling system malfunction CEL could be related?
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2005 f150 5.4.
I have a slightly rough idle and can feel a miss at 1600 to 2000 RPM. Sometimes running about 65 MPH up a slight grade I can slowly press the gas pedal and the engine will begin to miss much worse, causing the truck to shake pretty bad. When it gets this bad it will slowly flash the CEL and I get a P0306 code (Cyl 6 missfire).
The truck has 148000 Miles on it and the plugs were replaced at approx 120000 by the dealer.
In the last week I have replaced the plug in cylinder 6 (looked ok) and have replaced all the COP's along with the fuel filter and the injector on #6.
I haven't been able to get it flash the CEL light or throw a code since replacing the COPs though and I am at a loss at to what to try next.
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The engine was running rough when it hit 2K RPM only. above and below it is fine. replaced the injectors/O2 sensor and it ran well for a couple of months but it is doing it again. when engine hits 2K rpm it will sputter and run rough. engine light gives me code 171 engine running rich or lean. What else to look at..
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I have a 5 speed 99 Jeep Wrangler and when the car is running, it's extremely hard to put the car into first gear from a standstill. However, once it's in gear, shifting is fairly normal but still offers a little resistance. I feel like I have to wiggle it into gear. When putting the car in reverse from a standstill, the gears grind terribly.
Once the car is off, shifting is still difficult until I put it in reverse. Somehow, this "fixes" the problem and everything shifts smooth as a dream until I start the engine and then it's a 50/50 shot until it eventually fails later on.
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So as I was parking my car and I accidentally stalled it. So anyway I return to the car 20 minutes later to leave and when I start it up I notice the engine is idling at 2000 rpm and is making a loud hissing noise from the drivers side on the engine (I think). When I rev the engine it is slow to come back down to the 2000 rpm idle. When I put the car in gear and drive it, it likes to stay at 2000 rpm.
The car will accelerate without me pushing the gas pedal until it reaches 2000 rpm. Also when I shut the engine off, it sputters and coughs, almost like a backfiring motorcycle but rhythmically slowing down until it finally stops (around 3 seconds or so from when I turn the key off). The check engine light is OFF and the car is still "driveable" (I got it home) and typically idles around 900 rpm I think..
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I own a 98 jeep wrangler. Love the little jeep. But....big BUT...at random it chooses not to start, not sluggish start, dead absolutely no noise. I have spent well over 1500. dollars on new starters, batteries, ignitions, ignition cylinders you name it I have replaced it. This last time it started every time for well over a month, then one evening it just didn't so I let it set for a couple of hours as usual and then it started and we came home. I love my mechanic he is patient and doesn't make fun of me when I ask dumb questions...but this he can't figure out.
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I tried starting my 2005 Jeep Wrangler yesterday and there wasn't enough charge to get it started. I got a few slow revolutions and that was it. I gave it a jump and it started fine. Drove it for an hour or so and then went to restart it 3 hours after I shut it off and it was dead again. Another jump and I drove it for an hour (home). I was able to start it a few hours after that on its own, though it struggled to a bit.
Tried again this morning and it was dead from sitting overnight. A few other bits of info:
With the key in the ignition, the charge indicator is hovering just above 9V (it is a 12V battery) before I try to start it. When engine is running after start, it jumps to around 12V.
I am pretty sure I didn't leave the lights on or door open overnight. I haven't noticed the engine struggling to start leading up to the dead battery.
After I jumped it again this morning, it seems to be idling very low. In fact, the engine shutoff when I let it idle in neutral with my foot off the gas for a few seconds.
When I got in the Jeep this morning before trying to start it, it had enough charge for the radio and dashboard. When I turn on the lights/highbeams it struggled and the high beam indicator on the dashboard (blue light) was flashing. Battery is not too old. I don't have the receipt with me, but I think I bought a new one 3-4 years ago. The +/- connections are clean with no corrosion. I didn't look too closely, but I didn't notice any obvious connection issues from the battery leading into other components.
I'll probably go buy another battery, but wanted to check with the experts out there to see if there is anything else I should be checking. If I do get another battery
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I have a 85 cj7 with a 258 straight 6 and recently when I have been refilling the gas tank she won't start right away and I end up waiting 1 to 2 hours before she will start up and then she drives fine until you have to put more gas and the cycle happens all over again. What the problem could be?
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Video of Noise: [URL] .....
I am getting the above noise on startup, it goes away after 5ish minutes. It isn't exactly cold out. So I don't think its the oil viscosity. Its not a bad oil filter flow back valve, and its way longer than the oil lifters should make noises. I don't think it is a cracked manifold, I think the noise would be different.
Jeep wrangler 2005. 4.0L, ~99k Miles
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Have replaced distributor, spark plugs, coil, and still have very weak, erratic spark. Plugs getting plenty of fuel, won't start. What else I should do?
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I recently borrowed an engine code scanner after my check engine light went on and got a P0505 code on my 2004 Prius with 185,000 miles and started to fix things. I replaced the PCV and spark plugs as well as the air filter. It ran fine, but decided to also clean the MAF using CRC MAF cleaner and also clean the throttle body and butterfly using CRC Throttle Body cleaner. I also carefully washed out the engine compartment using Gunk Foamy.
I seem to have put it all back together, but now the ICE won't shut down, even when warm, and actually wants to rev beyond what seems to be needed. I got another scanner and got some stuff that I honestly don't understand. It said 2 codes then gave me P0505 followed by:
Mil On
Monitor 0 inc
6 ready
misfire
fuel
comp
catalyst
evap
O2 sensor
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So last week something happened that I've never had happen before. I was dropping my daughter off at school and I noticed that my dash lights weren't on. My headlights still worked and the blinkers did to.
When I got home and parked it, I checked out all the fuses. There was a 20 amp fuse that was blown, so I replaced it and then checked the relays under the hood. I turned on the key to check the dash lights and they still didn't work. The 20 amp fuse blew again, so I replaced it again. Now the dash lights work again.
However, when I tried to start it, it would turn over, but the fuel pump isn't turning on.
Long story short, I've replaced all 4 relays under the hood, installed a new fuel pump and also replaced some bulbs in my taillights and sides over the front tires. It turns over when I try to start it, but the fuel pump still isn't "kicking" on and it won't start. I feel like somehow, power isn't getting to the fuel pump.
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I was driving home the other day and my CEL came on... I checked the gas cap and waited a few days to see if it cleared. When it didn't clear I had the codes read and it came back with 3 instances of P0505.
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I had our '04, 149,000 miles in for PA state inspection and emissions test as well as to be looked at because of a P0505 diagnostic code. The symptom of the diagnostic code was that the ICE would not shut at all. The past few months I simply cleared the code (ScanGauge) and things were immediately back to normal until the check engine light came on again.
Anyway, in response to the P0505 today they replaced the air filter (I checked, it is installed correctly), checked for vacuum leaks (all okay) and cleaned the throttle body. My wife picked up the car this afternoon from the repair shop (independent, but mechanic trained by Toyota for Prius). Upon arriving home she said I needed to drive it because it is acting very strange. We drove it this evening and indeed it is acting strange. A number of times the engine revved up to 2800-3000 rpm when my foot was off the gas, e.g. slowing to go around a corner or even when sitting at a traffic light. The SOC was normal (blue bars), not high or low. It was also interesting, because even though the transmission was in D, the car was not pulling to go forward, e.g. at the traffic light-- in D, engine revving, but car just sitting there as though it was idling or ICE off.
The ICE would shut down and go to battery mode appropriately. However I noticed that the mpg would not go about about 110 when backing off the gas going down a long hill at around 50 mph (engine warm, battery normal charge). Normally this would bump it up to around 200.
This latter symptom of mpg not going about 110 is a bit subjective and we only drove around 20 miles this evening, but I know we did not experience the engine revving before the car being serviced today.
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I have a 2004 Prius with 196k on it. Over the past 3 months, I have had the P0505 CEL come on about 3 times. After looking over everything and not noticing it running differently, I have cleared the code and kept going. The CEL stays off for a 3-4 weeks, then comes back on.
Yesterday, the light came on and was accompanied by a rougher idle. I checked the code and the only one shown is P0505 reads as Idle Air Control System. I removed the airbox and cleaned the MAF sensor with MAF spray and cleaned the throttle body valve with throttle body cleaner spray. They were both dirty, but didn't seem too bad.
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I have a 2005 Prius with almost 244,000 mile and about a week and a half ago the check engine light came on. I went to an Advanced Auto and had them read the code for me, which came back with a P0505 error code. I have read several things on web that this code is a Idle Air Controller related.
I also have read that this could be to a loose or bad PCV valve, an air leak in the vacuum lines, throttle motor shaft might be binding, or a failed engine ECM.
The car runs and idle just fine, no stalling or a rough idling. The only problem that is obvious is that when the car is warm and I come to a stop or put in park, the motor will not shut off.
Which one of these would cause this to happen? Or could this be due to a MAF sensor that needs cleaned or replaced?
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I'm new to diesels. I just bought a 2004 F250 with the 6.0 V8. I have the high and low circuit, contribution codes on cylinders 4 and 8. I've only had the truck for a few days but I've been reading a ton. The symptoms are hard start, rough idle/shaking, no power when cold. When it heats up and I'm over 2000 RPM it seems to be just fine. Even when hot and below 2000 RPM it does ok. I've check the FICM. It reads 48V with key on and 48V running. My plan is to do the following:
Change the Fuel Filters
Change the oil filter
Change Air Filter
Change oil with 5-W30 synth and I have both Hot Shot/Rev-X
If that doesn't work, I'll replace the two injectors. How does that sound.
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I have a 2003 Jeep Wrangler (4 cylinder) that seems to be having a fuel problem.... about a month ago, it started lurching, having a hard time starting, it would lose power on drives and once or twice it has stalled on me while I'm driving on the freeway. I've had to restart my car going 60 mph... if I feel it lurching or surging, I have been able to keep the car going by shifting into a lower gear or taking my foot off the gas.
I just took it into the dealership and spent 1300 to get it diagnosed and fixed. I got a new timing belt, and a whole bunch of other stuff and on the way out, it stalled at the first stop light. Although it seems to be running better, it obviously didn't fix the issue. I took it right back and now they are going to have me bring it back on Monday to 'try to figure it out’. Where should I tell them to look?
Oh, and - I had to get a short fixed from the ignition key (I was able to pull the key out while the car was running) and they fixed it. But now, I can't get any reception on my radio...
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