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fuel pressure is right at 40 psi, fuel pressure is right at 40 psi,
AnonymousApr 26, 2009
yes checked spark, new plugs new coil packs
what about the converter? yes checked spark, new plugs new coil packs
what about the converter?
AnonymousMar 29, 2014
4.2 engine,replaced # coil pack, all new plugs, both O2 sensors, cleaned throttle valve. Vehicle runs good on the highway, when idling runs rough.4.2 engine,replaced # coil pack, all new plugs, both O2 sensors, cleaned throttle valve. Vehicle runs good on the highway, when idling runs rough.
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Have you checked for spark on all cylinders? Usually high exhaust temp is caused from lean mixture or incorrect cam timing. First check all cylinders for spark. Might be a bad ignition module. But my first guess would be a timing chain that has jumped a tooth or two.
Have you checked for spark on all cylinders? Usually high exhaust temp is caused from lean mixture or incorrect cam timing. First check all cylinders for spark. Might be a bad ignition module. But my first guess would be a timing chain that has jumped a tooth or two.
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I can't find a engine code 35 but 44 is a lean condition, check for vacuum leaks, Do this use starting fluid or carb cleaner to spray around intake manifold. If the engine smooths out repair the vacuum leak. I hope this helps you, take care.
Possible causes
Faulty Ignition Coil 1
Ignition Coil 1 harness is open or shorted
Ignition Coil 1 circuit poor electrical connection
Faulty Engine Control Module (ECM)
What does this mean? When is the code detected? Each ignition circuit is continuously monitored by the Engine Control Module (ECM). The test fails when the ECM does not receive a valid pulse signal from the ignition coil. Possible symptoms Engine Light ON (or Service Engine Soon Warning Light) Lack/Loss of Power Engine may be harder to start Engine hesitation Rough engine idle P0351 TOYOTA Description: The ignition system on the vehicle uses individual ignition coils for each cylinder. The Engine Control Module (ECM) controls each ignition coil operation. The ECM sends a ON/OFF signal to energize the ignition coil to create a spark at the spark plug when a spark is required at the cylinder.
Did you clear the codes? Car may still be in limp mode...
Also the 303 is odd. Are the sparks good on #3? May have an issue with coil or ignition module.
Dont get another harness. If you are using Autozone supplied coil packs, the problem is most likely the coils from Autozone. I have went through this exact same thing before. I changed the coild because one had a burn mark on the boot between the plug and the coil pack. I noticed it when changing spark plugs. The new coil from Autozone made the vehicle struggle on take offs and idle rough and the vehicle had no power. I installed another coil from Autozone again which was supposedly a better model and costed more. The vehicle ran a little smoother but the rough idle and small misfire was still there. I installed another coil from the dealership and the problem was fixed immediately. I also replaced one of the coil connectors for a different cylinder but only because i broke it when disconnecting the coil packs to remove the spark plugs. And when I installed all my coils and the new one from Autozone, I used dielectric grease on all the connectors. But the rough idle and power loss was immediate following installing the new coil from Autozone. Beware if you are using coils from another part store because many part stores get their parts from the same source.
Mine was doing the exact same thing. You will need to crank it up, raise the hood, take the oil cap off, place your hand over the hole, and if it sucks on your hand you have a blowed intake gasket.
These engines had a lot of problems with coils, most people just end up replacing all of them. You may find them a little cheaper online. There was a bulletin for broken or worn wiring inside the harnesses that go to the coils so you should carefully check back along the harness to each on, especially where the harness might move when the engine torques over.
Sounds the EGR valve and EVP sen is bad even if you tested it. The EGR valve cntrols idle and if carbon up will make the car stall or idle high and low (rpms going up and down) This was common on all cars during that time. I would say replace the EGR valve and senosr. This should take care of the problem. One more thing have the fuel pressure check on the car.
2.8 is the engine, it starts right up and idle is fine in park
fuel pressure is right at 40 psi,
yes checked spark, new plugs new coil packs
what about the converter?
4.2 engine,replaced # coil pack, all new plugs, both O2 sensors, cleaned throttle valve. Vehicle runs good on the highway, when idling runs rough.
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