Crossfire fuel injector question
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Crossfire fuel injector question
1984 Crossfire that has a high speed miss Not severe just a minor miss New dist Cap rotor button wires and ecm I am now thinking fuel injectors one reason is when I sit at a red light or idle for a minute or 2 there is smoke from the exhaust the appears to be from a rich fuel mixture so I am thinking a leaking injector. Perhaps this could also relate to the high speed miss aroung 2000 rpm ususlly felt when crusing at 60 to 70 MPH for a mile or so. Is does not go away you can feel it but dosent cause a stall or anything like that just a minor miss I am hoping they are related and changing the injectors will make it go away. Any one experenced this combination before? Solutions?
Rich idle / High speed Miss
Rich idle / High speed Miss
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From: moraga ca
If I get this right, your car has a miss at 2000 rpm at cruise, correct? Not exactly what a normal high speed miss is, but anyway, have you changed your plugs? What color is the smoke? Do you have trouble starting? Does the car crank for a while before starting?
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Yes new plugs grey black and smells of fuel No trouble starting funny you should ask sometimes it does seem to cranka while before actually starting it starts but does seem to turn over longer before it actually starts also new fuel pump and filter installed within the last 2000 miles that gave out on me couple months ago. dont recall having this problem prior to changing the pump and filter but I havent been able to drive the car much till reciently it was being painted over the winter I purchased the car in april of 08 and drove it casually till sept when it wrnt in to be painted then I finished the interior so now I am able to drive it more and started noticing the little things like this miss and the rich idle I am not sure but I also believe this car sit for a while before I purchased it but there has been about 10 tanks of premium fuel run thru it .
Sounds like you have some experence with the Crossfire injection Thats hard to fine these days
Thanks
Don Robertson
Chesapeake Va
Sounds like you have some experence with the Crossfire injection Thats hard to fine these days
Thanks
Don Robertson
Chesapeake Va
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From: The Top of Utah
Even in a lowly, rpm challenged, Crossfire engine, 2000 rpms isn't considered "high speed". You may be experiencing the same "lean missfire" I did when my EGR valve spring became weak and allowed the EGR valve to open further and sooner than designed. The additional exhaust gases leaned out the mixture causing my car to missfire and the fuel the ECM added, caused me to fail a smog test. A good way to trouble shoot for the problem is to drive the car with the EGR valve disabled, to see if that alleviates your "high speed miss".
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OK will give that a try. Now I need some assistance in the location of the EGR valve. Is it located on the intake manifold? Or is on the firewall Someone told me there was some controller on the firewall that possablly had something to do with the problem of the car running rich at idle.
Thanks
Don Robertson
Thanks
Don Robertson
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From: The Top of Utah
I would start HERE. The EGR valve is in the rear, right, side of the intake manifold. There is a vacuum hose to it that activates it. You can disconnect and plug the vacuum hose, or unplug the plug to the activating solenoid. Because the valve is closed by a spring, the vacuum must over come spring pressure to open it. Too weak a spring allows a given amount of vacuum, a known force, to open the valve more easily (sooner) and to a greater degree than designed.
RACE ON!!!
RACE ON!!!
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From: moraga ca
After the egr valve check, you might want to check fuel pressure after shutdown. If the pressure does not hold, you might have a leaky injector which could explain the richness and hard starting.
