S52 cranks but won't start

[fuginusername]

So I put a 803 maf on my s52 it ran was a little rough at first I drove it down the road it drove fine parked it went to start it a few mins later to park it better and it sounds like its trying to start but won't. I switched back to the stock maf and still does the same thing.

[Hova]

So I put a 803 maf on my s52 it ran was a little rough at first I drove it down the road it drove fine parked it went to start it a few mins later to park it better and it sounds like its trying to start but won't. I switched back to the stock maf and still does the same thing.

Should always start with the simplest items for troubleshooting. Is there plenty of gas in the car? Battery over 12v? Did you perhaps knock loose the 2 vacuum lines going into the bottom of the intake boot?

Try unplugging the MAF completely and starting it.

[fuginusername]

Should always start with the simplest items for troubleshooting. Is there plenty of gas in the car? Battery over 12v? Did you perhaps knock loose the 2 vacuum lines going into the bottom of the intake boot?

Try unplugging the MAF completely and starting it.

I have almost a full tank battery is fully charged and I checked the vaccum lines multiple times already and they are all connected. I didn't try unplugging the maf yet I'll try that in the morning.

[Hova]

I have almost a full tank battery is fully charged and I checked the vacuum lines multiple times already and they are all connected. I didn't try unplugging the maf yet I'll try that in the morning.

Do you have an M50 Manifold? Check the vacuum line connection that goes in the center of the manifold near the throttle body. Perhaps you knocked it loose.

Engines need: Fuel, compression, spark to fire. So check if you're getting fuel. Then check spark. pull a coil and spark plug out. Ground the threaded area of the spark plug, and see if it sparks. If you see spark, you can spray some starter fluid into the intake (remove the MAF for this) and see if it starts. If it does, then you likely have a fuel issue (pump, regulator, etc).

[AJLM34A]

If the only thing you did was put on an 803 maf and then put the sock maf back on, just focus on that first. Do you have an OBD2 scanner? If you can't get a scanner, just do a battery reset, then try starting with stock maf.

[Hova]

If the only thing you did was put on an 803 maf and then put the sock maf back on, just focus on that first. Do you have an OBD2 scanner? If you can't get a scanner, just do a battery reset, then try starting with stock maf.

He already tried swapping back to stock.

[AJLM34A]

He already tried swapping back to stock.

I was not telling him to put the stock MAF back on.

[fuginusername]

So the next morning I went out and it started first try so I'm not sure what the issue was