1999 350 hard start and rough idle
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1999 350 hard start and rough idle - 8/14/2006 6:47:44 PM
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dbapcp
Posts: 3
Joined: 8/14/2006
Status: offline
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I've got a 1999 truck with a 350. For the past couple of months it started rough and idled rough every once in a while. Now it seems to start rough and idle rough almost all the time. By starting rough I mean it cranks for a second or two and then sputters a bit, starts but has low RPM and a rough idle. Every once in a while it starts normally, crank it and immediatley it revs up to a normal idle. Back it out the driveway and it has a rough idle already. It seems to start better more often in the cooler mornings and the engine is cold (well, cool, it never really cools off in Houston Texas!). No matter how it starts or idles take off down the highway and it runs fine. I had the plugs, wires, distributor cap and rotor and fuel filter replaced and put in injector cleaner and fuel treatment all to no avail. My mechanic told me it may be the injector assembly although he says he looked at it and it wasn't gunked up. I've also been told it may be a vacuum leak, a gas tank sending unit (whatever that is! the fuel pump??), bad gas or even an engine temperature coolant sensor. There is no code and the engine light does not come on. What could be the problem? The injector assembly might cost $1000 and it may not even fix the problem.
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RE: 1999 350 hard start and rough idle - 8/17/2006 11:31:03 AM
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akimber
Posts: 8
Joined: 8/15/2006
Status: offline
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I was doing some reseach on-line trying to figure out my missfiring problem I found this website about fuel-injectors. What you discribe is exactly what the web-site has for a faulty fuel injector.
http://www.thepartsbin.com/fuel-injectors.html
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