jophuss36

iTrader: (1)

Ok so I was running the sand dunes at silverlake, the truck was running great, becides it would idle at 900rpm then jump to 3 grand and every time I would turn the key off and back on it would be one of the two. Then on my way out it just all of a sudden started pinging, mostly at idle. I checked my check engine light and it said knock sensor and map so I changed them along with the tps. Truck did the same thing wouldn't barly run. I then got amaf code. Changed the maf and same thing, only it kept piping this code up. I omed the wire at the computer and it all omed good. I took off the idler motor and covered the hole up with a piece of cardboard... It did the same thing. Unplug tps still same thing. Started out of no where idling st 4 grand. There is no vacuum leaks. Fuel pressure was at 58 with the key in then when started jumped down to 44. Imploded the regulator and it stayed around 56. Changed the regulator and it's doing the same thing still.

Now I'm pulling maf code, map code, tps code low input. At idle cold it idles at 1100-1200 rpm then jumps to 2300 then 4000. data is as follows
Tps 0.8
Rpm 2300-2350
Calc load. 4.7-5.1
Maf. 1.62-1.70
Map. 12.7-13.0
Coolant 201
Iat. 104
Ign advance. 14.0 steady
Lt ftrm 1. 0.0
St.ftrm 1. -20- -24.2
Lt ftrm 2. 0.0
St ftrm 2. -23- -27
Speed. 0
Fuel Sys 1&2. Closed then open. And back to closed
O2 s11. .44-.45
St Ftrm11. -18--23
O2s512. .435-.445
O2521. .07-.8
St ftrm21. -14.8--19.5
O2 s22. .435-.450
Pro status. Disengaged
Obd2 stat. Ca

wait4me

iTrader: (10)

Does the pink wire to those have 12v? You might just have a blown fuse.

jophuss36

iTrader: (1)

Humm I will check when I get home, but I checked all my fuses and they are good

jophuss36

iTrader: (1)

All spark plugs are perfect color, compressions 190lb in all cylinders, changed plug wires they were cracked but sane thing... Now I pulled a crankshaft position sensor.. Any ideas?

wait4me

iTrader: (10)

Did you pull the valve cover and look for broken springs?

jophuss36

iTrader: (1)

No I didn't..... That's a good idea though thanks il check today

MyTA99

What did you find?