Still stumbling....

racinreaper

racinreaper

New member
New cap rotor cr42ts plugs, new wires and fiberglass sleeves..New fuel filter and map sensor.. cleaned egr and intake air sensor beside main vac.. Motor is supposed to have L35 heads, mild cam,, stock chip and injectors. Fuel pressure at 40 with line hooked up. BUT it still idles 30 sec and dies.. strarts right back up.. misses if cruising at 35-40... and when you let off the gas the idle drops and then surges a couple of times to 2g and then back down. ANY IDEAS ..... should I be using different plugs for those heads? I have datamaster but not the laptop yet... I am tempted to pull my desktop out there.. but then I am not sure what I should be looking for since I have not used datamaster yet and not sure what to look for on it. IM GOING NUTS>>>>>
 
M

Maverick87

Member
Motor is supposed to have L35 heads, mild cam,, stock chip and injectors.
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Wouldnt you need a different chip? Syty's are speed densty not mas air. the computer wont add fuel for different cams or more airflow in the heads. So the stumble might be that the chip isnt right for your combo.
 
spooldup

spooldup

Super Member
One your fp seems a little high to me. Stock turbo? I am at 38 with the line connected. If you lean it out with a wbo2 to an acceptable limit the lower fp will help. Two you have a high stall converter wich lessens the load on the engine causing it to surge oer hunt. I have the same problem but with some fp tuning and driving it in "d" to keep line pressure up around town it's ok. You won't get rid of thre surge. You can give the trans to waller to have some work done to it to help keep line pressure higher or turn the idle screw in and deal with a high idle.
 
P

PPI Typhoon

DIY Madman
Are you getting any tach flutter??

While you were in the cap and rotor, I'd have done the ignition module while I was in there. I've had to replace them in both my Ty's and it made a big difference in both cases, completely claaring up one of them.

Might give that a shot. They're only around $40 if I remember correctly

Also as mentioned earlier, I'd look into a custom tune if you're running aftermarket parts as you are.
 
racinreaper

racinreaper

New member
Just took the valve cover off ,,, head casting number is 14094768... has competition cams magnum 7.25 length pushrods and Crane gold race 1.6 roller rockers. I cant find this casting number anywhere definitive.. any one know?
 
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