» View Question
donnny

donnny 1/9/2018

2000 Mercury Villager Estate 6 Cyl 3.30L

Engine

vehicle wont stay running runs funny wants to stall things look tidy under hood had codes 171 300 325 340 could be old

bought this 4 months ago ran great except for a few times it wanted to stall at light rpms surged.check engine light was on an off whether that was happening or not! then last week i went on 200+ trip got back went out next day and started fine but seemed to be jerking ever so lightly like it lost power for a micro second. when warmed up it wouldnt idle. drove it it ran good accelerating but let back on gas and erratic surging started and it wanted to stall if you let off gas! read some stuff online with thee vehicles took distributor apart all looked good! that's when i noticed it was likely a replacement. started checking other things under hood finally decided to unplug maf and to my amazement it now idled but would not take throttle above 2000 rpms . took maf out to check it cleaned it even though didnt look dirty. now van wont start with it plugged in. unplugged it van idles but slowly loses rpms and quits. i had done a code check but not since buying it so dont know if good.

3 Answers


HouseCallAuto

HouseCallAuto 1/9/2018

Ok, here goes..

Replace the ignition distributor assembly. I have seen enough. P0300 random misfire and a cam position sensor code P0340. Guess where the cam sensor is located in the Villager? Yes, inside the distributor and its not serviceable. The P0325 is a knock sensor that needs to be replaced. Its under the intake manifold and a bit nasty to access, but the knock sensor code will not cause you a symptom so skip changing it, that is unless you are also trying to get a pass on a state emissions test. The P0171 says it is running lean on Bank 1 so check and make certain that the air intake tube (large diameter hose with ripples goes to throttle body from air filter housing) has no crack in rubber, no air leaks. Look especially on bottom. Take it out if you have to to get closer look. Note: You have a greater than 90% probability of solving the majority or entirety of the driveability issue by replacing the distributor. Replace it. After replacing it drive the car and see if any new fault codes return and see if it drives normal. You can buy a reman distributor on RockAuto.com for $110.00 while the auto parts store will want maybe 175 or more.

Reply
1
HouseCallAuto

donnny 1/10/2018

distributor IS serviceable as far as parts replacement. ebay and some other online houses sell the gut parts. wil try to JY coil/pickup to see if that fixes it. maybe grab map/maf too. wondering about timing belt?

Samuel

Samuel 1/9/2018

If you really want to diagnose this yourself you need to purchase a code reader. You have a cam sensor code there. Lean condition. Random misfire. Knock sensor issue. This does not mean to replace all these things. You have to be able to read these in conjunction with each other. Remember these and erase and see what comes back first. Guessing the cam code. When it ran with the MAF off the computer was just reading off other sensors then.

Reply
0
Samuel

HouseCallAuto 1/9/2018

excellent answer Samuel.

Samuel

donnny 1/10/2018

have basic code reader dont know how old those codes were. erased them and ran van several times no new codes. when i pulled maf i got CEL and now its on steady even with maf plugged back up. map hose system looks complex compared with most like my old gm transport. also noticed distributor has external capacitor like old points cars!

Samuel

donnny 1/10/2018

rechecked for codes got the p325 and now p100 maybe i ruined the maf cleaning it? its a hotwire as far as i can tell

HouseCallAuto

HouseCallAuto 1/10/2018

Ignore the 325 as I have never seen symptoms from that code on Nissan Quest or Mercury Villager. If the MAF P0100 code showed up as a new code I would definitely replace it if there are no air leaks. If the 340 stays away dont replace distributor. The last time I replaced a quest/villager distributor there was nobody selling internal parts of the dist like now. And officially, the dist is not serviceable as there are no parts available from Ford or Nissan, only the assembly. I would do that if the 340 comes back, seems like 40 to 50 bucks off ebay.

Reply
0

Answer this question

( characters left)

Follow Question

what's this?
advertisement
advertisement