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hard start and rough idle
About a month ago my truck suddenly began to take a lot of cranking(~10 seconds with some pedal) to start. I looked through the threads here and figured that I had leaking fuel lines. I looked at my truck and saw that all the fuel lines that I could see were fairly new(I bought the truck a year ago) so I didn't replace them. I did notice that my fuel filter had a manufacturing defect and leaked fuel. I replaced it and the problem seemed to go away for a few days.
Now, the majority of the time, it takes a fair amount of cranking to start. It does not seem to matter whether the engine is warm or cold or what the air temperature is(it acts the same from 0-50 degrees). When it does start, I have to stay on the throttle for a little while and it does not run well. The truck shakes a lot and I get a lot of blue smoke and sometimes a little black smoke. After driving it for a few minutes, it runs fine except sometimes at idle. Sometimes it will idle about 100rpms below normal(900rpms) and shake the truck a lot. If I rev it a little, it will idle fine after I take my foot of the throttle. So my question is, is this an air leak in the fuel system or something else? If it is an air leak, should I start by replacing fuel lines or is there something else that would cause this?
Thanks in advance for the advice. Sorry if I am slow to respond to questions but I have very limited internet access until I get back to school when I will not have time to fix this.
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1996 Ram 2500, QC, LB, 5 speed, kdp tabbed, tweaked pump, 3k GSK. 156 timing. DDP1's. BHAF, silencer ring gone, 4" exhaust, Isspro EGT, boost and fuel pressure gauges, centerforce clutch, BFG All Terrain TA's, thuren track bar, psc steering box and brace, many radios, 220k
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Linear Mode
