Rough - Mazda - 626 :: 1999 - Rough Idling But Runs Fine At Higher RPM
Feb 6, 2011
This problem has been getting worse over the last 2 years. When the car starts it idles fine at about 1000 RPM. As soon as it warms up, it starts to idle rough, between 500 and 750 RPM. It almost quits running. As soon as you give the car some gas it runs just fine. About 3 weeks ago I got a "Engine Lean" check engine light error. I reset the system and have not gotten the error again. Since then I have: changed the MAF cleaned the EGR (made sure it closes completely and ohm out the coils in the actuator) changed the O2 meter on the exhaust manifold cleaned out the throttle body Ohmed out the air idle controller. What I should check next. I was planning to check the fuel pressure in case it is a fuel system problem. It is a 1999 ....
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Let me start with I have a 2003 f250 5.4. The motor blew on my truck and I had a 100k motor dropped in it. I've put new spark plugs, ohmd out the coils. I tried both sets of injectors. cat delete and new fuel pump. It has rough idle and stalls but runs fine at higher rpms. Also has basically no brakes. I am thinking vacuum but I've check all the lines. No codes either!! also cleaned throttle body.
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I bought a '99 MX-5 in the fall with 100000 miles on it. Most of the time it runs fine. But about every two weeks when I go to start it it will run real rough like its only hitting on three cylinders then will eventually smooth out after anywhere from 5 seconds to 2 minutes. But today it wouldn't start at all. Finally started just fine after trying for 15 min. My mechanic changed the EGR valve but it hasn't worked. The check engine lite stays on all the time but when it starts rough the lite will flash.
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I have a 1999 Ford Escort SE wagon with 112k miles on it. Last week when leaving work my car started very rough. This was unusual so I killed and restarted the car about three times before letting it run it's course (~30 seconds), after which the car ran fine. About a week later on my way to work the car seemed to 'sputter' (for lack of a better word) when I pushed down on the petal looking for some power on two separate occasions. On each side of the sputters the car seemed to respond fine, but when it did sputter there was a severe lack of power. I got to and from work just fine, but while letting the car idle in the parking spot of my apartment for a minute before shutting off the engine the check engine light finally came on. The following morning the car again started rough (as if it were misfiring/running on 3 of 4 cylinders) and this time it took a good minute before smoothing out. However, after the car smoothed out I experienced no issues on the way to work, no sputtering, no loss of power, nothing. Doing some initial online research I feel that the problem may be one (or more) of the following:
-Fuel pump
-Vacuum lines
-O2 Sensor
-Spark plugs (they are original)
-Fuel Filter (it is actually past due for replacement)
I plan on getting this checked out ASAP, but that still may be 2ish weeks away with my schedule. Some similar reports say that I may be having a 'lean mixture' issue (not getting enough fuel), but I haven't had the time to check the code. My question is, how "safe" is it to continue driving my car with the current situation? Is it at a super high risk of failure/random stalling during rush hour? Will it cause any damage to the engine if there is a cylinder misfire upon start up? I was also wondering if the car would be reasonably reliable to drive on a ~400 mile road trip on an upcoming weekend, but I am making plans as if it is not.
Additional Details:-Tried charging the fuel lines (car to 'ON' then 'OFF' position 3-4 times), had no effect on the morning start-up-Commute to/from work is about 20 miles
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2000 F350. Starts great. Idles fine. After it warms up a little, it will run rough and lose power like it is only hitting on a few cylinders. It will eventually stall unless I push the clutch in and bring it back to idle and then it smooths back out. I figured it was starving for fuel but I can rev it with the clutch in with no issue. I ran it up to 2500 rpm and held it there with the clutch in and ran perfect.
I let the clutch out and start rolling....missing again. The check engine light does come on but my scanner says that there are no codes stored. If I idle it, it will smooth out, and the light goes off. All I have done so far was change the fuel filter which was almost plugged shut and the housing was full of rust looking debris which I cleaned out. BINGO! Nope. Same issue.
I am really at a loss as to where to start. I bought this with 120k on it and it now has 170k and I have not had to do anything other than routine maintenance.
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96 civic 120K miles, stock, automatic.
In March I was running low on fuel, maybe 1 gallon left in the tank. It took a few cranks and on the last try i gave it a little gas and it started, albeit very rocky for about 1 minute of driving, filled up immediately and 2 freeway miles later, no real issues. I live in LA so very low ambient temperature is not a problem.
April through May, starting was a little rocky, it was inconsistently rocky too, sometimes there was no problem. Usually it's weak, stuttering, sometimes just cranking but I seem to get it to start. I stopped giving the pedal gas because I read that's bad (I own a vintage bike, so it's news to me). I don't drive that far and figured I'd try some Seafoam and some freeway miles would clean out any debris. Worked for that tank a bit for the next tank before the problem came back.
Still getting the rough starts, but now when I give the car gas as I pull out sometimes it doesn't accelerate for 15-30 seconds, maybe 25 yards then it drive like normal. No dying at all but getting worse with starting up.
I've tried turning the key (not turning the engine over) 5 times and cranking on the 6th and it seems to work. I thought maybe it's the fuel pump or fuel filter but read it could be an ignition coil/ spark plug/ spark plug wire issue. Two different ball games.
My MPG is not really droppingI had a new fuel filter put in in February as routine maintenance (thing was on so tight had to bring it to a shop so no rookie mistakes there). Timing belt &water pump replaced 6,000 miles ago
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The car idles rough on cold mornings but runs fine. It will stall while idling but starts back easily. I am getting a 1131 and a 1151 code with my scanner along with 0300 and lean bank 1 codes. I started having these problems after I had to remove the upper intake to replace coil packs. I was getting egr code and had an egr port completely block off but cleaned that out and no longer get the egr codes. Spraying carb cleaner around the engine I get a very slight bump in rpm around a couple of the intake ports could that be my problem or should I look deeper?
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1995 Mazda Protege1.5 LAuto153K miles.
My car was running fine, then one day it started sputtering while driving, mostly when I accelerated. It stalled and I could not get it started. This happened on a day when it was raining hard, but not sure that had anything to do with it. A few days later when I went to pick the car up it started right up, it had stopped raining and been dry for 2 days prior. But about a mile into the drive back home it stalled and I could not get it started.
Here is what I have tested so far.
- Put in new fuel filter.
- Tested the fuel pressure and pressure regulator
- Tested the injectors with a noid light.
- Tested that the spark plugs were producing a spark.
After I pulled the plugs and cleaned and dried them (they were wet with gas) the car started, but I think not because of anything really related to the plugs. What I've noticed is that when cranking the engine if I give it gas it will not start but if I keep off the throttle it will reluctantly start. But once it starts the idle is smooth and as it should be. Then if I give it any gas it immediately stalls. It seems to me given these symptoms that it is getting enough air to idle but not enough air to match the increased gas.
The only CEL code that I'm getting (which I had before this issue occurred) is the "closed throttle position switch" (I forget the number). If it was an MAF, or IAC, or EGR issue would I not get a code? What this could be and how to test it. Again my guess is its an air intake issue but not sure where.
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Mazda CX-7 sport that has rough idling when it is started and goes away when warmed up or driven. Is giving OBDII error code P0300 - multiple misfires. Where should I start looking?
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Owning a Hyundai. I have a problem and it seems to be pretty common but haven't gotten anywhere with it yet. Last week my 2004 accent 1.6 manual transmission started running rough. It was idling higher than normal and while driving would not go past a certain rpm (about 2500 if I had to guess,no tach). On the way home from work it was running this way and then started badly misfiring and shut off, when attempted to restart it would not. I pulled the codes with a scanner and got p2400, p0562, and p0121. I charged the battery and replaced the throttle position sensor, still won't start. I can hear the fuel pump kicking on when I turn on the ignition. Also found the ecu 1 fuse blown, replaced it and continued to attempt to start with no luck, fuse was blown again. Like I said I haven't owned the car long and I don't know much about it. I am not sure where to go from here and I don't know how all these symptoms are tied together.
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Starts fine. Runs fine till warmed up. Then dies at idle and runs rough on gear till 1000 rpm. Has only coded iac when unplugged. But would idle with it unplugged. I replaced it. Also got crank can code once while checking it ...
2001 dodge ram 1500 318 engine ....
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Our 07 Mazda5 (80k) once in a while will start and run very roughly, and pressing the gas to the floor only gets it to 3,000 rpms.It has diminished power for climbing hills when this occurs. Everytime this happens if we shut the car off and let it sit (between 10 minutes - a couple hours) it starts and runs like a top. We have added drygas 2 of the times, but the last time it happened was on the same tank of gas that we added the drygas to. Check engine light comes on, but will go off after a day or so.
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Today I went to the gas station and after I gased up and turned the car on my car started idling rough, almost to the point of cutting out. I started out on the road and my check engine light started blinking. After some time it stopped and just stayed on. The whole front end shakes pretty bad when at idle. The car has trouble accelerating till roughly 35-40 mph then seems to ride ok. I'm not very car knowledgeable, but I do take care of my car. I know I need to replace some of my hoses and spark plugs soon, but am worried that it may be more serious.
What I would like to know is: 1. What could possibly cause these issues and 2.
2003 Mazda Protege
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1998 Jeep Cherokee sport ... My mechanic tells me that my #1 fuel injector is always spraying and that that is why the jeep runs rough. This is after he already told me that my injectors were clogged and needed to be replaced (which he did). When the car is idling for a while, the exhaust really begins to smell like gas, so this seems to make some sense to me, unlike his previous diagnosis. But now he is telling me that I need to replace the computer to fix this problem.
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I have a 2003 F250 with a 5.4L V8 automatic transmission with 64,000 miles. The truck runs and drives well, but occasionally while driving, it acts like it shifts into a higher gear, slips a bit, then downshifts and runs fine. The duration of this "acting up" is about 1-2sec. It seems to do it when going up a slight grade at cruising speed about 40-50mph. (Not towing when it does it) It doesn't do it all the time. I'm planning to change the filter and fluid but am doubtful that will work. The fluid color is nice bright pink and does not smell unusual.
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I have a 1999 ford escort 4 door sedan, when the car is cold I can get it to start and it will run just fine, after it starts to warm up, it starts to make a misfire/ sputtering noise when it is starting to die when idling. when I am driving it, there are no signs it is going to die.
I took it to the ford dealership today and they said that I need to replace the fuel pump, and the relay control module.
I just replaced the fuel pump a week ago because I thought that was the problem. So I am thinking it is the Relay Control Module- only problem is I don't know where it is located, where it is?
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Replaced the idle air solenoid and the car still vibrates in drive when at the light, etc.. Engine mounts were replaced though I am sure that isn't relevant. Anything I can look for?
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My 2001 V70 24T runs smooth when cold as it warms up it runs rough with delayed acceleration reaction ....
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My truck started running poorly with an intermittent miss about 6000 miles ago. The miss gets more consistent when the tank is below 1/2. Fill it up and the miss goes away. No codes, shop that does a lot of V10 camper work could not figure it out.
My guess is that the fuel pump is going out and it overheats when the tank is low. The problem is getting progressively worse. Now it misses slightly with 3/4 tank and even a full tank sometimes.
Plugs have been changed, fuel filter has been changed, and the shop found 3 COPs that were bad before all this new intermittent miss started. The truck runs ok at wide open throttle.
Am I just nursing a bad fuel pump that will leave me standed soon? Truck has 170,000 mile with original fuel pump.
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I just got my first dub, and it is a project car. I have had it serviced and it still idles rough when in drive with foot on the brake but idles normal when in park. a
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I am working with a friend on his 99 Ranger with a 4.0 . When first started it will idle rough and hesitate for the first 300 feet or so, and then clear up and run smooth the rest of the day. If he lets it set for 6 or more hours it will repeat the problem. He has taken it to a local Ford dealer and they have replaced spark plugs, plug wires, coil pack, cleaned the throttle body, checked the air idle motor and passage.
He has had it to the dealer 3 times and their latest plan is to pull the heads @ a cost of 1500.00 to start. Since it runs well, no coolant in oil or oil in coolant nor loss of either fluid, I couldn't figure why they want to pull the heads.
To date it has not thrown a code, I ran it on a New Generation Star tester and cannot find a code. The truck runs great after the first intial start up and does not give any signs of cutting out or lack of power. My guess is it is losing fuel pressure overnight and is taking a while to reprime. Original fuel pump and 160K miles. Will do a fuel pressure test this weekend.
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