Ford Aerostar :: 1996 - Occasional Stumble On Startup / Engine Seems To Misfire A Bit And Car Shakes
Feb 4, 2013
I've got a 96 Aero with 128k miles. It's AWD with the 4.0L. It's developed an annoying "stumble" on startup. The engine seems to misfire a bit and the car shakes. It goes away when I give it some gas and/or start driving. This started out being very occasional but eventually started happening at least once a day. It doesn't seem to happen with the engine very cold or very warm. It mostly happens when the engine is "lukewarm" (having sat for about an hour). So far, it hasn't died on me. I ran some fuel injector cleaner through and it went away for about a week, but then returned (but not as bad). No stored codes. Within the last 10k miles I have had done:
Compression test (passed) about 10k ago
New plugs, wires
New fuel pump
New water pump
New fuel filter
Tranny rebuild
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My 96 4wd 4.0 Auto has a consistent misfire in the #6 cylinder. I've change out the plugs and wires and am considering changing the fuel injector for that cylinder. Looking it over last night, got me wondering if there is a way to change out the fuel injector without removing the upper intake manifold and the entire fuel rail. As you all know, these things are a beast to work on when the engine is in place. So, is it possible? Inquiring minds want to know (and don't want to spend an entire weekend changing out on fuel injector if there is an easier way )
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My sister has a 2001 Prius w/ 150k miles. She asked me if I could shut off her check engine light. From what she tells me 1-2 times a year on very hot days (high 90s) when she starts the car it will stumble and stall (been happening since 03 when she got it).
I took it to autozone to get the codes which were:
P0300 - I assume all the misfire codes are from it stalling
P0301
P0302
P0303
P0304
P1636
P3002
Since she said it was normal for the car I just cleared the codes for her. She did have this checked out one time at a dealership when the car was under warranty and they found nothing wrong and blamed it on the weather.
I searched the forums for 1636 and 3002 codes the 12v battery seems like it could be a likely culprit (it is the original battery as far as she knows). A few weeks passed while I was researching the codes and the battery options and she had another problem. (still haven't ordered the battery yet)
She says the car loses engine power 1-2 times a week (she drive 4-500mi a week). The dash stays lit up and the power comes back quickly. Sometimes while accelerating it will just stop accelerating and then go back to normal, or on the highway it will slow down and then be back to normal. Check engine light is back on and the new codes are:
P0420
P1636
P3002
I'm going to get a new battery ordered today but I'm kind of skeptical that it has anything to do with this new problem.
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1988 4.0 - noticed fuel mileage going down and an occasional stumble for a while but now I am getting some black smoke more when I let off the throttle than when I going down the road if I rev the truck get all kind of black soot all over the floor otherwise runs fine idles fine the iac has been replaced air filter replaced check the fuel pressure regulator for any gas leaking into the vacuum line and its clean.
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A bit about my truck : 2001 F250 CC SB 4x4 175k miles
Wicked wheel, 6637 filter, DP tuner, Summit 5" exhaust, pressure regulator somewhere in the boost circuit to fool the computer a bit....
Every few times I drive the truck it will stumble and maybe even stall. The issue feels something like a CPS problem, although I've swapped out a few CPS to see if I by chance had a bad one in the engine as well as a bad one in the glove box. No changes. I was driving home from work one afternoon and it was running particularly bad. I stopped off at a local garage (who doesn't work on diesels and was reluctant to plug in....but did because he's a nice guy).
He plugged in with his snap-on tool and came up with P0603 and P1211. The P0603 seems to be nearly inevitable with a tuner. Check P1211 sounds like it could be an issue with a number of things, but I tried to attack the free and cheap issues first. I dropped my tank and had a look inside. I was hoping to find a squirrel wrapped around the sending unit, but there was a disappointingly small amount of crud. I cleaned it up and put it back in, then changed my fuel filter. No improvements.
So I decided to get with the program and buy AutoEnginuity. Got it. Even did some reading in class and did the initial homework assignment on page 2 or 3. Seems like the best thing to do it hook up, set up some parameters to monitor, and drive around recording until the problem happens. But.........what parameters do I want to monitor? I don't want to overtax the OBDII bus with too many requests such that my data looks like crap.
A few other things............ In the last year I swapped out the valve-cover gaskets & harnesses with an all-in-one molded setup. About a month back I replaced the exhaust back pressure sensor and tube.
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So I was driving along at about 50 MPH and came to a normal stop for a red light. Sitting at the light for approximately 10 seconds and feel the engine stumble or possibly misfire.
I immediately look for any idiot lights and see none, however above the mileage range instead of the pages that are normally shown I see:
LIMIT --- MPH
I drove for about a mile and everything seemed fine, I pulled off into a lot and rebooted the car and now everything is back to normal.
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My 93 with 210K miles threw a new one at me the other day. Not 1 mile from work with AC running, it started stumbling a bit at around 40MPH. I just assumed it was the AC cycling and the Van was in OD. Dropped into D and drove her on home.
Well this morning was round 2.... got about 2 miles from home and it started stumbling again (no AC this time). Just happened to look down at my digital dash and the speed was jumping all over, finally settling on 0 MPH. I got about a mile down the interstate and it suddenly reactivated and displayed 70mph.... smooth as silk.
OK, so I know that the rear diff. has a sensor for ABS, and obviously a pulse wheel on the diff. Is this sensor the input for speed? From other makes, I understand the pulse train input is "conditioned" in another device ( hardware) which then outputs to the dash display.
Based on these assumptions, I'm going to assume the crazy speed variation was playing hell with the ECU. When it settled on 0 mph it was happy again. Can't just be a display issue as there would have been no stumble. Getting ready to drive her about 3.5 hours this weekend to go trout fishing.... obviously the cruise won't work but otherwise it appears to function WITHOUT the speed input.
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I have had some slight rough running with a cold engine and stumble <2000rpm. Finally it tripped a CEL which was read as a misfire code.
The mechanic swapped the coil and plug(recent) and no change. He did a compression test and air blew out the exhaust. So.......the car needs a valve job which entails motor removal and fixing the head and reinstall. He rough estimates this at $2000 and rate is $65/hr.
He mentioned looking at pistons and may be a bit more if rough.
This car well maintained (170,000 miles 2005 Legacy turbo wagon with manual)...
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I have a 1996 Ford Escort with ~128,500 miles on it.
When I start the engine (either cold or hot), occasionally the engine will sound like it is missing and, if I step on the accelerator to give it more gas, after ~10-15 seconds the engine runs fine and the problem disappears. The engines shuts off if I don't step on the accelerator.
This happens approximately 3-4 times per week and I drive the car every day. I never know when the problem will arise.
I took the car to a Ford dealer to have it looked at and the mechanic, without doing any testing, said that it was either a leaking head gasket or a cracked head. The mechanic later then ran some tests upon my request and confirmed that it was not a leaking head gasket or a cracked head. No further tests were performed at that time, so I still am left without any definitive answer as to what is causing the problem.
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when i turn on my car it shakes and engine light blinks it happen this morning when i start my car.
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So I've had ongoing issues with this car that no mechanic seems to be able to diagnose. It jerks when I accelerate and decelerate pretty badly. It sometimes lets out a big cloud of smoke right when I start it. Now, it has developed some pretty violent shaking when I first start it up. It will only do this if the engine is completely cold and car has been sitting overnight. I feel like all these symptoms are related somehow. I have changed all the spark plugs and cleaned the throttle body. I've also had all the motor mounts replaced. I really wish the engine light would come on but it will not and never has.
It's really annoying that it only happens on startup so when I take it to the mechanic, well, they can't replicate it. What to try?
2002 Toyota Camry LE V6 136k miles Automatic
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I have a 1996 GMC Sonoma extended cab, 2.2l engine (not vortec) purchased in the United States. I’m having trouble setting the timing correctly.
I recently replaced the camshaft and crankshaft sprockets and chain, and after several attempts to set the timing, the engine still shakes badly and struggles to run smoothly, especially at idle. (It did not do this before the repair.) My code reader picks up the following codes: P0106, P0108. It seems to me that the timing is off despite my best efforts.
I’m going to try and attach a picture of the timing chain and sprockets as they’re currently set because the camshaft timing mark is strange on this vehicle and I’m not sure if it’s lined up correctly. Does it looks right? (Red mark on cam sprocket made by me; timing mark is supposedly the circular hole above that tooth.)
I did several other repairs at the same time that I did the timing. I have gone back over as much of these as possible and I don’t think I did anything wrong. As cars go I’m strictly an amateur but I work as a small engine mechanic so I have some experience with the way things feel when they’re done wrong. Nevertheless, if the timing is right, maybe I botched one of these?
The simultaneous repairs:
Removed head
Replaced hydraulic lifters
Cleaned carbon off valves
Checked pushrod straightness
Changed gaskets (several)
Replaced oil pressure sensor, coolant temp sensor, & thermostat
Replaced coolant hoses
I did all this because I hit the 150,000-mile mark and I want to keep it running for another 150,000.
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1996 Ranger 2.3. I bought it from a friend 2 months ago. 228,866 miles. The motor seems to stumble as I'm going through the gears. I've cleaned the mass air flow sensor and installed new air filter. Check engine light has always been on, O'Reillys hooked up their computer to it and said Emission Valve Malfunction. I see the charcoal canister, then I have 2 electrical sensors on same line. First one from canister looks like what Rockauto.com shows as a Vapor Canister Purge Valve. The photo has it with a yellow orangeish top. I don't know what this 2nd sensor is. It has a blue top.
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I have a 97 F150 4.6. The truck has developed a slight stumble/misfire when under acceleration. Once at speed it runs fine. It has not given any codes. I've checked for them several times. The plugs and wires have been changed. Is it possible that a coil pack could be bad without throwing a code?
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i just picked up an 06 f150 with 5.4l 4x4 xlt package. Love the truck as it is my 1st Ford HOWEVER..... the truck is running super rough at idle and keep getting code for cylinder 5 misfire and bank 2 lean (which i am assuming is from cyl 5). here is what i have done so far...
New Coil packs
New spark plugs
New fuel module
New fuel injector on cyl 5
Still has a "stumble" when accelerating around 45 mph and shows code for cyl 5 misfire then will then throw code for bank 2 lean.
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Got a 1996 Ford Ranger with the 4.0L in it that has a misfire on the #3 cylinder and giving check engine code: P303. Have tried new plugs, wires, distributor, switching out the coil pack with a known good, checked injectors for pulse, checked injectors, moved injectors and still the misfire remains on #3. Removed the valve covers and all appears to be well.
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The other day I pulled into the parking lot put it in park and let it idle for a couple minutes, it stumbled and when I started driving off it was missing. I pulled the valve covers off and check the connection.. I drove it home and it had a bad misfire at 1500 RPMs. The truck shook violently at that RPM but when I got it up over 2000 smooths out..
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Misfire is on #6. Feels like a partial miss, not every revolution, and there's no noticeable miss while cruising or holding a higher rpm in neutral. It's a B3000 with 97k miles. New Motorcraft plugs, new wires, 10.7k ohms across coil terminals (1-5, 2-6, 3-4).
I've swapped plug wires between cylinders and side-to-side on the coil. I also sprayed MAF cleaner all around the intake looking for a leaky gasket. I feel pretty confident I'm looking at a bad/dirty injector or valve issue. I plan on doing a compression test next and hopefully nail it down to one or the other.
I'm asking for input on my diagnosis so far. And how difficult is it to replace the injector? Will I need to remove the upper intake?
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For some time I have known the coils are going bad and cause occasional misfires but recently something new is added. Backfires and balking down to not moving. codes were po307 po300po430. the reader tells me the likely cause would be the vct solenoids. Also they offer a set of 8 coils at autozone with lifetime guarantee. Are these any good? I have read on here to beware of cheep coils. 2006 f150 5.4 miles is 119,000 have not changed spark plugs yet.
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The check engine light on my 1999 1.8T Passat is on. It started with a little miss right after startup. Then in neutral, after revving the engine to say 1,500 rpm and letting off the gas, it would nearly stall. I plugged in an OBDII analyzer and came up with codes P0102 MAF or VAF circuit low input and P0304, Cylinder #2 misfire. I replaced the spark plugs, as they were old anyway. Still the same symptoms. Then I replaced the mass air flow sensor.
The check engine light still went on after it was cleared, except this time it was P0302, Cylinder #2 misfire, P0102, P1613, Auxiliary inputs aux. outputs control, and P1426 Mfg. Control/auxiliary emission controls. Soon after, the car started running fine on it's own and I again cleared the codes.
Then a day later, the check engine light is on. This time, it is only the P1426 - Manufacturer control auxiliary emission controls. The Bentley manual calls it Tank Vent. Valve Open, which doesn't mean anything to me and the Bentley manual is of no luck. (The error code almost implies that it is the famous loose gas cap, but I have checked that - unless the gasket is bad). FYI: I have 99K miles on the car.
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I have a 98 Ranger SuperCab XLT 4WD 4.0 Auto. Occasionally, especially when it has been sitting for more than 3 days, it shakes for maybe 30 seconds on startup. It smooths out gradually after that, maybe 15 sec. to normal smoothness. It seems like it is firing on all cylinders and is more like something out of balance.
Never does it when sits less than 2 days. When it happens, the longer it sits the worse it shakes.
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