Starting problems; MAF possible suspect

[pgt892]

Hello all. I recently got a 2002 Xterra and as such didn't drive the 240 for two weeks. When I went to try and start it, the rpms would jump up and then drop down rapidly until it died. I got on NICO and looked it up. I unplugged my MAF and after stumbling for a minute it held a strong idle and didn't die. So I used some CRC electrionic cleaner and sprayed the MAF, with an indirect spray as to not damage the little sensors in the MAF. After I let it dry out for a day and hooked it all up, the same thing occurs and the car dies. What could have happened to it while it was just sitting there? Could the MAF have been on its way out and just crapped out while it wasn't being used. I have had the swap in for a couple of years now without problems. Any thoughts would be appreciated.

[pgt892]

Should I trace back the wiring or swap MAFs or look at something else? A little help please.

[spider_slayer]

how about seeing if you could get your hands on a friends maf and make sure it is the problem?

[pgt892]

I just went out and tried starting it again, and it is having problems even turning over now.

[S13FASTBACKSR]

Should I trace back the wiring or swap MAFs or look at something else? A little help please.

if the wiring hasnt been touched then you dont need to look at that..check the voltage of your maf with the key on and let us know what you get..also check to see if you have voltage to your coilpacks and ignitor as well as continuity

[sr power]

unhook the maf and try to start it. with the maf out it will run in open loop on preset values.

[S13FASTBACKSR]

running rich at all? any misfiring if you try reving it up? check the voltage of your maf and let us know what you get

[pgt892]

Hello all. Thanks for the help. I just recently lost the SR FSM and so I had to find it again and run the diagnostics for the MAF. The MAF is toast. Is the KA24E MAF install just plug and play or do I need to change some wiring? Thanks again for the help.

[S13FASTBACKSR]

actually i believe i read somewhere that the ka24e maf does work at not the de but i could very well be wrong you are going to have to search or shoot me an offer (shippe) on my sr maf which works perfectly fine.

[pgt892]

Well I put on a new MAFS because my ECU was throwing code 12 and the car still won't start. The ECU was throwing code 11 (CAS) and 12 (MAFS) for a minute, but it is sending 55 (all good) now. But the car still won't start. I know all it needs is spark, air, and fuel but I don't know where to start looking now. Thanks for all the help.

[S13FASTBACKSR]

bro the maf i sold you didnt fix the problem? damn sorry to hear that man..trust me the maf was in great condition when i took it off..only took it off to upgrade to a z32...the reason you are getting a code 55 is because you havent been running the engine..the engine has to be running prior to have a code stored.......its been awhile since we've talked on your problem...lets see..is the engine cranking at all? if so are you getting spark? let us know about this/ let us know what its doing when you try starting it and we'll get it figured out

[pgt892]

Hello. It's all good, I thought that it was the MAF the whole time. When I try to start it, it cranks over but it doesn't start. I checked the resistance on my coil packs and continuity on my ignitor chip as per the FSM and they all checked out. I have a full tank of gas and my MAFS should be working now.

[S13FASTBACKSR]

your injectors may not be working properly..one or two of them may not be working at all which means no fuel coming from them or they may be staying open too long which means too much fuel and causing your engine to flood...it sounds to me that this would be the problem more than the cas being off since you didnt even mess with the cas correct? your injectors may have went bad while the car was sitting....pull your fuel rail off with the injectors still connected in the rail and to the wires as well..then turn the key on wait about 10 seconds and crank the engine over ( have a buddy do that..so you can see if the injectors are working properly or not) and also you would usually pull the coilpacks when doing this but in your case you dont have to...also you can usually tell if an injector is staying open to long if the spark plug to that injector is blacker than the rest...but since your car isnt even starting i think that one or two of them may not be working at all...i think its a very good possibility that this is your problem.

[pgt892]

Awesome. I will try that out hopefully today. You are correct about the CAS, I didn't touch anything on the car until it wouldn't start.

[S13FASTBACKSR]

if you find out one of the injectors or more is bad after doing what i told you and you put new ones in and the car still doesnt start then adjust your cas because it might be too far off for the car to start now since you messed with it...let me know man ..i want you to get this thing on the road

[pgt892]

Hey what's up? It's been awhile, but I just got time from work and school and a nice day here in Indy to work on the 240. I pulled the rail like you said and had someone crank the car and each injector worked perfect. However, I lost one of the little black spacers for the injector bolts so I couldn't put it all back together. At this point, I would have to assume it's one of the coil packs, but I checked the resistance on all of them and they were fine. Does anyone have any idea what it could be?

[Anubis.Ice240sx]

Check your spark plug.. I'm having the same problem right now. The car running rich, to much oil and fuel going to the spark plug there getting flood it. My problem is that the spark plug are getting black, so it won't spark. I found out my problem is why my car running rich is the MAF has come bad.... I hope this help you out..