Recent content by ccoyle71

I should add that I've had the belt off several times and wiggled all the pulleys.....and can't seem to find an obvious culprit. Thanks again.....

04 SR5. 4.0 L with 330K. I've been chasing a noise under the hood. Definitely a serpentine related pulley....it changes with the RPM's and gets louder. I really thought it was the alternator after using a stethoscope - it sounded pretty loud, and has probably been given me 200K miles...

Thanks for all the advice. Work covered me up the last few days, so I haven't had a chance to pull the plugs yet, but I'm going to get after it this weekend. Drcoffee - I have a cheaper scan tool, but I do think it shows a reading for the MAF - I'll report back on that. I have definitely...

I have cleaned the MAF, but never replaced it. Plugs are probably a year old, but that's a good point - I'll pull them tonight and have a look. I don't think I have a vacuum leak, although my testing methods for that have been diy and I've never hooked it up to a smoke machine. I can pull the...

I've been dealing with this for a while......but this is the first time I've posted about it. I'm hoping maybe someone can shed some light on what may be causing this. My 4Runner is an 04 with the 4.0L V6. 285K miles, and I plan to drive it forever. Still runs great, I've owned it since new...

Thanks for that. I've driven about 50 miles - no CEL on. I have cleaned my MAF - so I'll probably see how things go......but that's a good tip. I'll be aware and ready to replace it at the first sign of trouble. Thanks again.

Problem solved - and I should have checked this earlier..... A/F ratio sensor on the bank 1 side. I didn't zero in on that because it is less than a year old.....But as DJ suggested, I swapped the two, and it flagged the other bank. Found a testing procedure to confirm, and sure enough the...

Back to work on this thing last night - spent about 2 hrs looking for leaks, still can't find anything. My friend with a smoke machine is out of town until after the first of the year....so last night I found an old cigar from a friends wedding....and tried my own "smoke" test. Does anyone...

Thanks guys - all really good suggestions. I"m headed out of town for a few days, so this will have to wait until Tues or Wednesday of next week. I hate leaving without solving it - but family calls. I'll report back with what I find and any other questions I have. And thanks again for the...

Thanks guys - I REALLY appreciate the feedback. It makes perfect sense - about the upstream A/F sensing more air (that's crept in after the MAF) and compensating by adding fuel on that bank. My bank 2 fuel trims are normal (+/- 1%)....so it seems that the issue is just on 1 side. Do these...

Also..... I don't really understand fuel trims and OBDII diagnostics.....but I've been googling / Youtubing and maybe someone can help me with this. I have a cheap scan tool that I've just used after my research, and my fuel trims at idle are really high. This makes sense to me that the ECM is...

Thanks guys - I really do appreciate the replies. Last night I swapped the plugs and the pcv. My plugs were pretty shot, so after pulling the 1st one.....I thought I may get lucky and have it fix my issue. But, alas, the code came back today on my way to work.....and it still stumbles...

2004 SR5 - 260K miles. I love my 4Runner, and I'm hoping to drive it forever. Very few issues mechanically thus far - just routine maintenance. I'm stumped by a P0171 code that popped up (lean bank 1). I've replaced O2 sensors recently.....both up and downstream. Prior to the 0171, I had a...

To close out this thread..... So after a few drive cycles, my ABS, TRAC, VSC lights went off. No idea. I ultimately didn't replace anything. I did wiggle some wires, and re-seat connections, but honestly don't think that was it, since it didn't solve it the first time I tried that. It...

Thanks. It's so bizarre......after fiddling yesterday, then letting it sit for a while.....I get in last night, and everything worked. Still had an abs / trac / vsc light on.....but speedo worked the entire time to pick up one of my kids from a friend. 30 min drive, no issues. It also warmed...