p0351 , p0352

7654800neon · Post by **7654800neon** » Fri Apr 20, 2012 9:42 pm

i keep getting these codes ive replace the coil and wires ive checked the wires going to the coil and really dont know what to do next i dont know if mabye its from my map seeing boost

Post by **occasional demons** » Sun Apr 22, 2012 9:59 pm

Check the coil connector for corrosion. If it was the plug wires, you would get a P0300, or 301 through 304, depending on which cyl's were not firing.

The codes refer to the continuity of the wiring from the center wire to the coils and back to the PCM drivers. If the wiring connector(s) is/are bad, you will get the codes. I think you have eliminated the coil as the culprit. If there isn't any power at the center wire, it may also cause it, but there also would not be power to the injectors either.

The PCM should be grounding/breaking ground on the outer wires alternately to fire the coils. The center is the common power supply.

The worst case is the PCM has failed, and the drivers are blown. If coil shorts somehow, there isn't any real protection for the PCM.

IDK if one coil can blow both drivers in the PCM.

7654800neon · Post by **7654800neon** » Sun Apr 22, 2012 10:50 pm

will i did some serching and people said sometimes the crankshaft position sensor could be bad and i did this test they said and i replace the sensor now it wont start at all i put the old sensor back still nothing put my stock coil back on and nothing im getting spark and fuel im wondering if i jumped timming

Post by **occasional demons** » Mon Apr 23, 2012 9:38 am

You should get a cam/crank sync code if the timing was out enough to not start.

There is a plug in the timing cover, that you can check the cam mark by when #1 is at TDC compression stroke.

7654800neon · Post by **7654800neon** » Mon Apr 23, 2012 1:25 pm

Yea I'm going to check it tonight I don't know what else could do I've tryed 2 coils I've replaced the coil plug

7654800neon · Post by **7654800neon** » Tue Apr 24, 2012 9:41 pm

ok i was playing around with it for awhile and took my tach driver out and now it starts and drives but now at idle im running all the way rich with everything back to stock and i got a p0171

Post by **occasional demons** » Tue Apr 24, 2012 11:36 pm

You have something causing a lean condition, and the PCM is dumping fuel to compensate. P0171 is a lean code. Check for vacuum leaks, etc.

Or it could be a leak in the exhaust before the o2 sensor. Air entering via a bad gasket, or cracked manifold will throw the o2 sensor lean.

g_force58 · Post by **g_force58** » Thu Apr 26, 2012 10:52 pm

Bill is right about the possible lean condition. My 2000 ES had a problem with going lean until I found a crack in EM under the top heat sheild between the #2 and 3 runners.