D-Jet WAAAAY To Rich, or JOES 2012 HERSHEY EMERGENCY THREAD Options

[jsayre914]

My 2056 w/ D-jet has almost 200 miles on it, i have been tweaking little things here and there. Today I was trying to adjust the TPS. I turned the ignition on and slowly opened the throtle till i heard 20 clicks and then i tightened it down. Got on the freeway and seemed to run a bit better (less bucking) but then i drive 30 min and starts jerking like crazy

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I am loosing at least 1 cylinder under steady cruise and pick it back up on accleration. I get to the end of the freeway and i cant even idle, feels like running on 3 but still has full power. I also hear a knocking sound.

shut it down. put the tps back where it was, pulled the plugs. BLACKer than black. Wipe them off and start it back up. Engine is idling rough and i smell gasoline strong from the exhaust.

I pulled the wire off the head temp sensor and grounded the lead to the negative side of the battery, and I think it helped. I also adjusted the idle screw and the knob on the ecu till it seemed like it smelled less like gasoline.

Here I am, firing on all 3 with full power, engine pulls strong but a lot of misfiring due to rich fuel i believe


what the hell is going on here???




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[davesprinkle]

Pull off the manifold reference line from the back of the fuel pressure reg. If fuel leak out, then you've got a ruptured diaphragm in the reg and you're passing fuel down the vent line into the manifold.

According to the Cap'n, this isn't a common failure, but dammit, it happened to me. Makes the car run rich, but in my case, it still held fuel pressure.

[underthetire]

Pull off the manifold reference line from the back of the fuel pressure reg. If fuel leak out, then you've got a ruptured diaphragm in the reg and you're passing fuel down the vent line into the manifold.

According to the Cap'n, this isn't a common failure, but dammit, it happened to me. Makes the car run rich, but in my case, it still held fuel pressure.

Never seen a vacuum line on a djet regulator?

[Bleyseng]

Pull off the manifold reference line from the back of the fuel pressure reg. If fuel leak out, then you've got a ruptured diaphragm in the reg and you're passing fuel down the vent line into the manifold.

According to the Cap'n, this isn't a common failure, but dammit, it happened to me. Makes the car run rich, but in my case, it still held fuel pressure.

Never seen a vacuum line on a djet regulator?

Only when some PO installs a Ljet fuel pressure regulator on a Djet FI system.

IF its boggy I'd look at the mech adv weights inside the dizzy sticking not giving you smooth adv with 30 yr old thick grease.
Usually about 28 degrees adv is the most you can time a type 4 without problems esp if you have the vac adv hooked up. (not the retard hose).

Rich AFR can also effect the way the car runs resulting in a Boggy feeling as the engine struggles with a rich mix..