My mechanic just told me I have one of my six cylinders that has a compression rate of only 25. I am weeping as I continue to pay my car loan. Looking for info, if this can be repaired vs. putting in a replacement engine?
View 5 RepliesI've been fighting some issues with the truck and decided to do a compression test to decide if I want to try to keep 'Old Yeller' alive or not. I'm all for working on it until I have to dig into the lower end of the motor. I rented a compression tool and the results were a little shocking. I did this test with a slightly warm motor, fuel pump relay pulled, all spark plugs pulled and throttle @ 100 %. Motor turned over 10 times for each cylinder. I even moved all the rubber o-rings on the tool up on the threads to make sure I was getting a good seal.
Cyl 1 - 40
Cyl 2 - 0
Cyl 3 - 0
Cyl 4 - 80
Cyl 5 - 0
Cyl 6 - 60
Needless to say I didn't even bother doing this wet. My only real question is can this be close to accurate. I drive the truck daily. 160k mi on it.
I'm fighting the dreadful P0171 and P0174 codes and after a couple cycles I will get misfire codes. Its low on power (hard to keep @ 70MPH with some wind) and gets 10MPG right now. However it starts and runs and stays consistent (even though it rumbles like it has a nice cam in it).
Is it time to put Old Yeller down ? Are these compression results even remotely accurate ?
It's at 65k miles, was sitting around for half a year with a previous owner. Started with hpo issue that I seem to have resolved with new ipr. I'm also doing injector seals, nipple cups and dummy plugs in the meantime to seal off the system.
I had ran a compression test with a 300psi gauge on a couple cylinders as I was changing glow plugs and harness, and they showed above 350 psi. A couple others showed barely 150, so I figured I blew up the gauge. That's when I went and bought a harbor freight diesel gauge and while I was waiting for the otc adapter whip to come in I took apart the oil rail and was getting ready to do injector seals and nipple cups.
I have now tested all the cylinders with the proper gauge but only to get the same dreadful result low compression ranging from 150-200 and rising 50 only with a bit of oil added to the cylinder.
If I don't have compression I'm obviously not going to get it to start although everything else showed up good on the torque gauges before it was apart. Why I don't have compression on any cylinders? I'm getting a new compression gauge today just in case, but seems unlikely it's the gauge.
2000 f450, truck has been running great and then all of a sudden starts running really rough. I check the oil and its dry! it was 9 quarts low! i checked the oil 2 weeks prior as i often do. i change the oil every 4500 miles and now this. i had driver side injectors done about 5 months ago. I take it to my mechanic and he said he thinks it has low compression on 2 cylinders but didn't do a compression check( not sure how he knows). He told me to run it until it pukes , keep putting oil in it with lucas oil additive. Then i will have to have the engine rebuilt. The truck only has 175000 miles! i thought these things were supposed to run forever! Does this seem right to you guys? I bought the truck a year and a half ago and have always kept up with it. has dp tuner but everything else is stock. Smoke comes out of the oil fill tube slowly but doesn't send puffs like a locomotive. mechanic said the turbo is fine.
View 14 RepliesI've got a 2015 F250 with a 6.2 Liter with no compression on 3 cylinders. The dealer just diagnosed it and has not opened it up yet but the mechanic says it is probably a broken valve spring...that it is not uncommon in this engine.
My concern is not repairing the spring my concern is what a "free spinning" piston in 3 cylinders does to the life expectancy of the main and connecting bearings in this engine. I have rebuilt engines in the past and I have bought re-built from auto parts stores and from Jasper and I have never had any last more than 60-70K miles. It seems to me that even with very little mileage on the engine with three of eight pistons jumping around under no pressure that there could be considerable scarring of the bearings or bearing surfaces. I am no expert by any stretch but this is an engine in atruck that has less than 22K miles on it and I ain't real happy about opening it up let alone trusting for the next 280K miles that the bearings have more wear on them than they should have. It was only driven about 20 miles total like this but that is a lot of pressure on a highly tuned and pretty darn precision machine.
This is the newest vehicle I have owned since 1988 and I meant for it to be the last pickup I drive (I drive 'em til the wheels fall off) but I am not overly confident that even if this is a one off problem that it hasn't caused even more damage that won't show up for another 100K miles or so???
I have a 2000 ford f250 5.4 2v that's been having a shaking at idle and no power what so ever. I tried diagnosing it myself and came up with nothing. I finally decided to take it to the dealer and they are telling me that the right side has no compression on 3 cylinders. They want almost 7000 for a new engine. I was wondering if it was possible to get away with just putting a new head on the right side?
View 13 RepliesWhile I had my glow plugs out to crank the motor for the HPOP work I have done I checked the compression on all the cylinders. 6 of the cylinders were 275-280, got 250 and 110 on the others. I put oil in both the low cylinders and the 250 went to 260 and 110 went to 150. I pressurized the low cylinder and with the valves closed it was leaking out the exhaust manifold also had a small amount of coolant come out the water pump. Removed the cylinder head and didn't see anything unusual with the cylinder that was reading low in fact the if was the best looking cylinder of the four with nice looking crosshatch on the cylinder wall.
The other three cylinders has some slight brown haze on them which I assume is rust. This motor probably hasn't run in 18 months and the truck was a non-runner when I purchased as a theft recovery, no history on the truck. Taking the one head to a shop for them to check it out. What's the opinions out there with the low compression? Be ok once it runs and rings get coated with oil? The motor is out of the truck so maybe I should tear it down completely hone and put new rings in it.
I had My VW tiguan 2011, Died all of a sudden, where went to supermarket and went out and the car is not starting at all.
So next morning had it towed to the dealership for investigation. Now after a week of tests and investigation and replacement of Fuel HP pump @ the engine still not working.
They did pressure test, and surprise came "no compression on all 4 cylinders".
They will need to open the engine and do further investigation. Hope it's just a gasket leakage
The car is still less than 5 years and mileage is 174K km, just made oil top up and general checks few days before the incident. all services @ dealership if not on-time, before time.
Wife's 2008 ES350 with 80k miles died in a parking lot. Wouldn't re-start with warning lights for Trac Off, Check Engine and VSC. Called tow truck from our local repair shop. Tow truck driver tied and started the car with no lights. Wife went ahead and had it towed.
Repair shop called and said that car started for tech but died w/o any warning lights. Shop started checking it out and found that it has no compression on all cylinders. In talking with service manager, we discounted the timing chain since the car will re-start, at least a few times. His gut feeling, something with the internal timing gears and such.
Repair shop has found a used engine locally and has it on hold while we decide what to do. The shop doesn't rebuild motor and just diving into it for exploratory surgery could be expensive with no assurance of positive results.
I sea Foamed the truck today. I will be pulling my heads most likely and am doing a few things beforehand just in case. History: low compression and misfire on #2. Have changed plugs and swapped out cops. Paper against exhaust pipe sucks in and pops against the pipe intermittently. Seems like intake valve.
Anyways, poured in a whole damn bottle through the brake vacuum line. The engine sputtered a bit but never stalled. I saw almost no smoke after a whole bottle!! I thought with 156000 miles it would smoke like mad. I have taken very good care of this truck and changed oil every 3 to 5 with synthetic 5-20 since new. Could it be that clean???
I have 2004 f150 small v8 (4.7?) Has about 92000 miles.
When warm truck runs excellently. At first start up the idle is very rough and raw gas smell for about 4 minutes then truck runs like new. Will start and restart great until it cools down overnite.
My actron says missfire cyl 3. Did not fix it. Dealer says that on start up compression is zero in cylinder three but is 100% when it warms up. Suggested I run seafoam through it. He thinks it has a vacuum leak or carbon at start.
In my limited knowledge I am thinking:
sticky lifter
bent push rods
warp valve
My 2008 Honda Accord started burning oil at the rate of 1 quart per 2000 miles. It currently has 48,000 miles on it. The dealer told me that this is within Honda's specifications. Honda won't do any warranty work unless it is burning oil at the rate of 1 quart every 1,000 miles. The dealer service person told me that if I use their oil and filters - get my oil changes there at the dealership - it will burn much less oil. Question - if they are using some sort of high mileage oil, and it does indeed burn less oil, is this problem considered fixed? Should I hold out for some engine work before the warranty runs out? How should I approach this?
View 19 RepliesMy 2004 F-150 5.4 has a rattling noise coming from the passenger side of the engine when at operating temperature. The cam phasers and all related parts have been replaced. The reason I was prompted to change the phasers, chains, guides and tensioners was due to the engine stopping on me as I returned home from an errand. The engine had already shown signs of needing the phasers replaced.
The engine runs very smooth while warming up. Vehicle lacks power and has a rough idle after warm. Took the truck to a local mechanic, in the process of making a diagnosis, he performed a compression test. Cylinder 3 psi was much lower than the other 7 cylinders, the mechanic recommended replacing the engine (possible bent valve).
I have a Haynes manual, have searched youtube and checked this and similar forums, I have yet to find instructions on the removal of the head from the block.
(2004 Ford F-150 5.4 3v)....
My 2004 f150 has always been great to me. all the way till now at 255k miles. My truck is misfiring really bad. Here are the codes I have :
P0506 low idle (because of the misfire)
P0356 ignition coil F (6) primary/ secondary circuit
P0308 Cylinder 8 misfire
P0174 system too lean (Bank 2, right side of engine)
p0316 misfire detected on startup
This problem happened 2 days ago. I reset the codes and they all come back together in 10 minutes. the misfire is very bad. I wonder why coil 6 has a fault code but number 8 has the misfire code.
Initially I brought the car in for repair because the engine was cuting out at higher speeds so they replaced all 4 coil packs and did an oil change.
After 50+miles of driving it was taken home. Later on we tried to start the car and it wouldn't start. The car has power and it cranks.
We then bring it back to the shop and they say there is no compression. I suspect conventional oil was used.
Would the wrong oil cause my problems? 2008 VW Passat Turbo...
I have a 2005 F150 with the 5.4L V8. It has 70,000 miles on it and until yesterday and has been a great truck. While driving in traffic yesterday the truck started running rough and hesitating. It through two codes - misfire cylinder 5 and misfire cylinder 6.
In response, I purchased two new coils and 8 new autolite plugs. The plug installation went smoothly and the coils all went on without incident. However, this didn't fix the problem!
The next day I found that cylinders 5, 6, 7, and 8 were all having issues. At this point I also had an "O2 stuck lean" code so I pulled the plugs and found all four brand new plugs fouled and smelling like gas and an exhaust that smelled like raw fuel. This led me to replace the O2 sensor on the drivers side. With the new O2 my lean code disappeared but I still had a rough idle.
Further troubleshooting found that injector 6 was stuck open (which presumably fouled my O2 causing it to read lean and dump fuel thus fouling all the plugs on one side). I replaced the injector and the rough idle disappeared and all seemed really well as the truck idled in my driveway.
However, as soon as I hit the road I noticed a major hesitation. The motor is also noticeably louder and has a very hard time accelerating. I'm thinking that I've plugged up my cat by dumping so much fuel in to it and the hesitation is caused by a lack of breathing - does this sound possible? How would I confirm this without replacing the cat? Anything else I should look for? I'm fairly confident I have combustion in all 8 cylinders now so I'm leaning towards intake/exhaust issues.
My 2006, 4.2 has been really erratically not starting. Turns over fine but will sometimes fire up and tries to run on maybe 2 cylinders, then stalls. Now it won't even do that, nothing. No check engine light or codes. Guess what the thing started up this morning 7 degrees out and running like a charm. Turned off and nothing again. Replaced relay for PCM ,no change, still no codes.
View 9 RepliesI do not know the 5.4l 3v as well as my last 360ci dodge. It's a 2005 F-150 SuperCrew 4x4, got it cheap, and it's got issues. Got codes for misfire on cylinders 4 and 5 and Coil 'D' circuit malfunction. Obviously it has codes for limited power as well. was wondering how cylinder numbering goes and what coil is 'D'.
View 6 RepliesI got to replace mine because the hood won't stay up on it's own and is heavy to lift. I was wondering if these things fail often. Mine is an '08.
View 5 RepliesAfter driving 2 hrs on the highway, my 2008 Kia Rio chugs and spits out dark smoke. Last month, shortly after this happened, while exiting the highway, the car lost power completely. I was out of town when this happened. The mechanic couldn't find anything wrong. He did a transmission flush and replaced the crank sensor. It is running again, but the chugging persists after driving 2 hrs on the highway! I am scared of being stranded again. I also think the car is burning oil, as it often is low, and it's not leaking, as far as I can see.
View 2 RepliesMy 2008 Malibu service manual states that the check engine light should briefly come on when I start my engine. When the engine is cold this does not happen. Also, it happens infrequently when the engine is warm. My Chevrolet dealer says this is normal as the light checks out when tested. Chevrolet has not given me a difinitive answer on this. My concern is that if this is a problem it may surface at another time when the light should go on and cause damage if not attended to. If the manual says the check engine light should go on when the engine is started and it doesn't, doesn't this mean something is wrong?
View 14 Replies