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Unread 08-13-2011, 02:09 PM   #31
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Default Re: 4 stroke HEI Conversion

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Originally Posted by Walking-Again View Post
MC,
Did you ever get your's running right? I too did the conversion on my 295, mine will run in neutral at very low speed but at full throttle it just sputters. Can someone let me know if the pulsar could be causing this? or is one of those all or nothing parts?
I still haven't messed with the HEI again. Coil is still on and working fine. Maybe this winter after the kids fall ball season I will try again with all new wire...
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Unread 10-19-2011, 05:17 PM   #32
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Default Re: 4 stroke HEI Conversion

I had an issue with a battery charger left on longer than it should have been. It melted the ignitor and caused the coil to break open. I discovered it was going to take $400 to fix things at EZ GO. In Reading all I could on this forum and others I decided to try the $50 fix mentioned here. I have a 1993 295 CC four stroke Robin engine. I used the Chevy HEI and Chevy Coils mentioned in this forum. I hooked it all up and turned the key...It started and Idles like a champ. It runs great up to a certain rpm then wants to bog down. I don't really think it is a carb problem. I have seen others having the same issue or similar. Any ideas? Could I have a bad pulser causing this issue? Some have suggested that if a pulser works at all, it works. Bad grounding perhaps?
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Unread 10-25-2011, 01:31 PM   #33
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Default Re: 4 stroke HEI Conversion

I am still in the same boat as you. Mine has been sitting since July because I just got frustrated with it and have to many other projects going. My pulsar readings are very low compared to spec but the only responses I have gotten are "they either work or don't work, nothing in between". I have an inline spark tester and when I put it on the cart it's very dim where on my lawn tractor (16hp) it's at least twice as bright, that is why I was leaning towards a "weak" pulsar. I even had Advance Auto swap out the coil pack thinking that might be it. No luck!
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Unread 10-26-2011, 12:24 AM   #34
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Default Re: 4 stroke HEI Conversion

i agree with walking about that comment ...they either work or not . A weak output pulse from the pulsar will effect both hei and ignitor units. These devices are looking for a strong ,high amplitude pulse to trigger the electronic switch on hard so the current through the coil is adequate to produce the blue spark required for good firing. When you get the yellow spark, the coil current is to low and thats due to the electronics only partially conducting. Things that will improve pulsar output are, be sure they are clean,,no mud,metal filings,or wet. The air gap should be set to .025 to .030. The wider this gap is ,the less output you have. The wires going to hei or pulsar should be twisted, this keeps stray voltages from affecting the circuit. Ohms reading should be somewhere in the area of 150-700 ohms, very low readings indicate damaged or wet pulsar. The better test is to crank motor and with your dvm set to AC volts you should read.5V and greater..the higher the better. Other things like overheated or shorted coils, low voltage to coil, overheated hei/ignitor units, bad spark plug wires, etc.
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Unread 11-16-2011, 03:47 PM   #35
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Default Re: 4 stroke HEI Conversion

If uou use this on a 4 stroke, the input wires may be reversed if it seems to load up or foul out.. The 4 stroke coil takes a big kick since both plugs fire at the same time. One piston is on compression and the other piston is just finishing exhaust. (180 out pf phase in the firing), but they both fire twice during 2 rotations. Weird but true.
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Unread 01-27-2012, 09:44 AM   #36
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Default Re: 4 stroke HEI Conversion

I am trying this conversion on an 04 EZ GO with a 295 cc Robins. I purchased a DR39 Ignition coil and a GM HEI ignition module. I tried the coil alone and the engine appeared to fire on every other stroke. When I tried them together, I got the same results. Reversed the pulser wires with no change. I made sure both were mounted solid and grounded. Any ideas?
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Unread 01-27-2012, 10:22 AM   #37
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Default Re: 4 stroke HEI Conversion

Reverse the wires going to the coil.
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Unread 02-01-2012, 09:04 AM   #38
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Default Re: 4 stroke HEI Conversion

Tried only the coil again last night. Installed the GM coils with new coil wires. Tried to reverse the wires to the coil and it still had the skip. Could I have the wrong coil?
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Unread 02-20-2012, 06:54 PM   #39
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Default Re: 4 stroke HEI Conversion

has anyone actually got this to work i would like to do it this weekend !! also do you have to change the coil my big thing is not to have a rev limitor
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Unread 02-23-2012, 08:49 AM   #40
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Default Re: 4 stroke HEI Conversion

EZ-GO carts do not have a rev limiter! Club Car does, but an EZ-GO does NOT. The max throttle is controlled by a cable coming from the transmission on a 4-Cycle engine and a cable and plate from the driven clutch on the 2-Cycle. Yes it does work, you have to stick with the coil on the 4-cycle, because there are TWO output coil wires that fire at the same time. The 2-cycle only has one wire, since there is only 1 piston.

Last edited by bonduranth; 02-23-2012 at 08:55 AM.. Reason: clarity
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