1997 ranger super cab codes p1506 p0304 p0171 runs fine for 2 minutes then idle drops give it some gas then it runs good for another minute or so and almost dies again

SOURCE: 98 E-250 Rough Idle; codes p0156,p1131,p1151,p0301,p0171,p0174+

po301 thru po306 all misfire codes cylinder 1-6 remove plugs and replace them..... set the plug gap first
i suggest u replace the wires also if they never been replaced all these misfire codes can set the others and one is for the oxygen sensor ( 02s or HO2S) CIRCUT MALFUNCTION do u know how to check wireing systems
do the tune up plugs (set gap) .052-.056 change the fuel filter also. clear the codes hows it run
this info is for 98 E-250 4.2Litre
what engine do u have 4.2L or 4.6L i know it is a v-6 by the codes

SOURCE: I have a 1998 Ford

A possibility:

I have a 1998 Mazda B2500 (same truck/engine/trans). A few years back, I was getting a rough idle a few minutes after startup, and my tachometer would fluctuate wildly. This progressed to the point where I was stalling out randomly while driving. With the help of my local mechanic, I ended up diagnosing it as a mass airflow sensor error. My best guess is that oil or water had gotten into the intake. Whatever the cause, after replacing the sensor (saw them for $60 on eBay, right after I paid $300), it's been running smoothly since.

P.S. -- I don't think this is a mileage/wear and tear issue so much as it is bad luck. I only had 13k miles on the truck at the time.

Josh

• 122 Answers
• Posted on May 19, 2010

SOURCE: check engine lights on 99 ford ranger ODB codes

DTC P1506 is set when the PCM detects the engine idle speed is greater than the desired rpm. This is most commonly caused by a dirty or bad IAC valve. Cleaning the throttle body will, most likely, cure this problem.

p1131 means that the bank #1 O2 sensor, the bank closest to the firewall, cylinders 1-3 is showing a lean mixture. Could be a vacuum leak, a misfire on that bank, an exaust leak upstream of the O2 sensor, fuel control or injector problem on that bank, a faulty O2 sensor, faulty PCM, faulty wiring in the engine control wiring harness.

P0171In the vast majority of cases, simply cleaning the MAF sensor does the trick. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling also Inspect all vacuum and PCV hoses, replace if necessaryCheck for a dirty fuel filter and proper fuel pressure

Marvin

• 85242 Answers
• Posted on Nov 23, 2008

SOURCE: engine runs rough at certain speeds 3.0 v6 flex-fuel 1999 ranger

Check and see if the EGR valve is leaking, to check this spray water on it at idle, if the water steams off the valve is leaking and is the source of your problem, also are you sure you hooked the new DPFE sensor up right? re-check it..

SOURCE: i have an 86 ranger 5 speed with the 4 cylinder it

Have you checked it for spark when it dies? It sounds like a bad ignition module.