Poorly running 408 - Dodge Dakota Forum

Subject: Poorly running 408
IP: Logged

Message:
I have just instaled a 408 stroker into my 97 dakota with a 5spd. I am running the B+G cam calibration, KRC 530/502 214/224 cam with 1.6 ratio rockers, 24lb FMS injectors, with ported TB and heads, M1, headers etc. The truck starts fine and idles decent, a little rough but that is to be expected. THe problem is when acellerating it revs smooth untill about 3000-3200 rpm then it feels like its breaking up, and doesn't rev or pull like it should. THe more throttle you give it the worse it gets. I pulled the plugs and they are showing a very rich condition. Compression was between 180-190psi on all cylinders, and the coil is working properly. I reset the engine at TDC on #1, set the distributor drive gear to the proper alignment and adjusted the sync to +3-4, and TPS voltage is .66. I am wondering if the cam gear might be set to one of the +4 or -4 keyways. Would that cause a condition like this or does anyone have another idea? I am lost and disapointed.

GraphiteDak
GenIII

7/28/2005
01:08:57

RE: Poorly running 408
IP: Logged

Message:
Wierd. Maybe the PCM is making it run overly rich.

Does it blow BLACK smoke out the exhaust when it happens?

Or maybe it's got an ignition problem. Crossfire of plug wires, something wierd in the dist cap, etc.

180 to 190 static compression is awesome BTW.

pokeypennell
Dodge Dakota
JOIN HERE

7/28/2005
16:15:02

RE: Poorly running 408
IP: Logged

Message:
Its got a brand new accel cap and rotor, and new taylor wires and the plugs were new autolite platnums just as I had in before. We also tried switching the coil from a jeep and it did the same thing. I doesnt blow smoke out the exhaust it just smells really rich and the plugs are blackened.

daddio
Dodge Dakota
JOIN HERE

7/28/2005
16:39:11

RE: Poorly running 408
IP: Logged

Message:
map sensor maybe.

P 1

Post a reply to this message:

Username Registration: Optional
All visitors are allowed to post messages