fj60 with a hiccup

[bkfj40]

I've been trying to resolve this problem for a few weeks. It has been to two mechanics, one of whom is familiar with cruisers. He couldn't replicate the problem...

It is not RPM dependent, it can happen at 1500rpm or 3000 rpm. It seems like stutters, like it is out of fuel, but then the engine starts right back and keeps running. It is only a single hiccup, a split second.

I thought it might be the fuel filter, but I've changed that. There were some rust particles in the filter. I also pulled the hard line into the carb and got some debris out of the inlet. New plugs, new wires, cap and rotor as well. Is it possible to have some little piece in the carb that can cause a hiccup like this?

Any help is deeply appreciated...my wife is threatening to get a 100 series (hey, I'm not saying that it is a bad thing, but I need to sell this 60 first)

Thanks!
bk

 

[Landpimp]

coil? let the cruiser run and give the coil/ignitor a good wack or rattle or shake, ect and see if cuts out.

 

[bkfj40]

coil? let the cruiser run and give the coil/ignitor a good wack or rattle or shake, ect and see if cuts out.

good suggestion...the initial wacks provided no problems....I will try it tonight after the ride to my Lions Club meeting after the engine warms up a bit...

any other thoughts?

bk

 

[dd113]

I have been chasing a similar issue on a customers truck for quite a while. Make sure the EVAP system is all 100%. Disconnect and plug the F,P, R hoses on the EGR. Pull and reseat the carb idle solinoid power. Is is full emissions or no emissions?

 

[zebrabeefj40]

If you're running full emissions one of the first things I would do is replace all the rubber vacuum hose. Buy 30 FEET of the stuff! If it's OEM original there's bound to be cracks and leaks in the system that can give all kinds of goofy problems that are difficult to diagnose... BTDT...

I have also somehow had charcoal find it's way into the carb from the the charcoal canister. I put a clear fuel filter in the vapor kine from the carb to the canister to prevent that from happening again.

Good luck!

Nick Jennings

 

[65swb45]

If you're running full emissions one of the first things I would do is replace all the rubber vacuum hose. Buy 30 FEET of the stuff! If it's OEM original there's bound to be cracks and leaks in the system that can give all kinds of goofy problems that are difficult to diagnose... BTDT...

I also think this is a great place to start. The first thing that came to my mind is an intermittant valve sticking problem. VERY hard to replicate or diagnose.

Good luck.

 

[bkfj40]

The truck has no emissions....or maybe the other way of looking at it is that it does have emissions, but no equipment

I'm at the point that I would consider putting on a new carb if I knew that would kill the problem. These intermittent problems are the worst ones. I hate to pull the existing carb because it is doing so well, but there has to be either something in the carb, an intermittent electical component, or a fuel delivery problem....gee that really narrows it down I bet I've just taken care of 99% of all the problems for vehicles on the road...

 

[dd113]

Try this, disconnect the idle control solinoid power from the carb. Rig up a hot line directly to the battery then see if it does it. Might be an intermittent break in voltage.