I honestly feel this is whats wrong. But it quickly went downhill from there. I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. If your fuel pump is bad, your car will be sputtering. I had to replace the plastic retainer clips at the tune of 8 bucks apiece for about 2 cents worth of plastic. Careful with the wires, they break easy. I find it's best to take it off and spray it with electronics cleaner or brake cleaner.
Fuel tank, fuel filler neck or fuel sending unit 'O' ring is leaking. Note: An Ultrasonic Leak Detector can be used to help detect a leak. Do not just throw parts at this. After a couple days it wouldn't idle at all, and it was misfiring while driving. In other words the 02 sensor is indicating lean and the fuel trim has reached the programed limit trying to correct it.
Connect one lead of your digital voltmeter to the black wire on the sensor and the other lead to battery negative. You having an intake leak is a good possibility. Then start the engine and add fuel either propane, starting fluid, or carb cleaner into the throttle body to force the mixture to rich. . The Engine Control Module calculates the necessary compensation to correct the offset between the actual and the theoretical ratios. Start and stop the fuel enrichment and watch the meter to see if the volts drop as you stop adding fuel.
Any other ideas where to look? Thanks for all you help and Merry Christmas. I have experience with many Cougars from 1987 on - and all but one were completely timed by the computer without a distributor. Don't touch it or probe it, just spray inside it and let dry before reinstalling. Purge valve vapor line is clogged, damaged, or disconnected. Jul 08, 2014 p0401 egr flow insufficient.
I found the vacuum leak. When the Check Engine Light comes on, either one of these codes, or both, may be found when a code reader or scan tool is plugged into the vehicle diagnostic connector. If you had someone read your codes, normally they have the ability to turn off the check engine light. Again, maybe a 15 min job. Sometimes, that is all that's needed.
I have a picture I can scan here if you want. In case the amount of the compensation value is extremely large The actual mixture ratio is too lean. Also the upper and lower gaskets on the manifold were gone, the intake channels are as black as the exhaust channels! Youtube is cool but no one on there is fixing a Cougar. I just read what was written but some pics would sure help out! The code definitions are a good starting point when determining the cause of the service engine light but where do you go from there? Mercury Check Engine Light Codes Welcome to the Mercury Check Engine Light codes page. The distributor-based engines in those years are all timed according to the standard procedure. We do ask that you please read the info available on the site first so that we can help reduce repeat questions.
Due to it throwing codes for both rich and lean and after finding a thread searching those. I can do all the work myself just want to know if anyone has expeirenced a similar problem and noticed that one thing is setting these codes off. That elbow is a know failure point. If you are unsure of any abbreviations, check out the acronym list by clicking on the link at the left. Sometimes sits at 2000 rpm after depressing gas pedal slightly before dropping back down. It all started with my check engine light, which I ignored.
And lets face it, if the service engine light is on then you need it now! If you find one missing let us know and we we'll add it immediately! Here is how we suggest you proceed. These 2 codes are common indicators of a well-known failure on the 1999-2003 Windstars. Ok, got the vacuum hoses properly connected i hope slapped everything back on, started it, let it idle and everything sounded good. Trouble code P0174 means: Fuel System Too Lean Cylinder Bank 2. I'm not a mechanic, and I didn't have any tools other than a ratchet set and some screwdrivers.
This engine is known for vacuum leaks, so before you start throwing oxygen sensors at the problem, it pays to perform some diagnostics. These sensors have a very high failure rate once a vehicle has more than about 60,000 miles on the odometer or is more than five or six years old. Posted on May 31, 2009 P1151 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. If they are cracked or the rubber is swollen, replace the line. I suggest you seek out the services of a good mechanic. Possible causes would be a vacuum leak, clogged fuel filter, or a leaking intake gasket this is the most likely cause because Jaguar has a service bulletin on this very issue.
A code P0171 may mean that one or more of the following has happened:. Basically this means that an oxygen sensor in bank 1 detected a lean condition too much oxygen in the exhaust. Also check your fuel filter you might as well just replace the fuel fiter. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. The connector may have a removable cover.