Possible tuning problem.

[chriswells78]

I have done tons of mods to my 5.0. Ecam, 1.6rr, TM headers, Custom intake, 30# injectors, 90mm MAF, custom cat back, yada, yada, yada.

I have a popping noise coming from my passenger side header, possibly cylinder #3 and or 4. I think my problem may be in my tune. I have Sniper tuning software and I'm thinking maybe I need to retard the timing a bit for the E cam. It only happend at low idle. At mid range RPM, the noice moves to the muffler area.

Am I thinking right to retard the timing? I can adjust the timing +/-5* at low, middle and WOT. I can also adjust the fuel at low, middle and WOT.

Edit, it is not throwing any CEL codes.

 

[Turdle]

I'd think a tuning issue like this would have it popping in all cylinders--
Could you have crossed 2 spark plug wires? Could they be arcing?
Maybe an exhaust valve isn't seating? hmmm--
I'd like to hear this---

 

[chriswells78]

I think I'm going to take a video if I don't get it solved tonight. I found a guy with a 5.0 Ranger w/ 331 and an e cam on eectuning.org that had a similar problem and they were talking about a vacuum leak and a possible lean condition. When I get home tonight I am going to check all of my vacuum lines. If that doesn't fix it, I will write another tune with the fuel curve a little higher.

 

[chriswells78]

well, I think the E cam has too much lobe to it and isn't making the motor produce enough constant vacuum at stock idle. I bumped the idle screw in the TB up 3 full turns and the popping went away. I checked my data on my Actron code reader and it said the idle was in the neighborhood of 900-1000 RPM. I wrote a new tune with the idle bumped up 150 RPM then backed the ilde screw back down.

Unfortunately now I have tons of back fire. Do any of you think the backfire is fuel related? Should I add to or take away from the fuel to cease the backfire?

 

[jah81592]

Where are you wanting to take fuel away from? Leaning out the entire tunefile won't fix what you are explaining.-j

 

[chriswells78]

Already fixed it, thanks

 

[storlied]

No explanation?............

 

[chriswells78]

bonehead mistake, #3 and #4 wires mixed up.

 

[storlied]

Ah...
It happens.

 

[CDW6212R]

The coil packs are nice, but the labeling is very poor.

 

[chriswells78]

I had them on the packs right, but swapped as they went over my heat shield that I added for the headers. They run next to each other for about 12 inches and I kept missing it when I ran over them with my fingers tracing the wires.