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Unread 03-10-2010, 09:26 AM   #1
w212warren
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cps

where is the crank sensor on my 89 yj any onehave a pic, jeep died has new coil, icm, wires, dist, it has little spark at coil when i tested it but no spark at end of plug wires, think its the cps mabey

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Unread 03-10-2010, 10:06 AM   #2
Que89YJ
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The crank sensor is at the top of the bell housing in the rear of the motor.
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Unread 03-10-2010, 10:13 AM   #3
sentinal02
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Quote:
Originally Posted by Que89YJ View Post
The crank sensor is at the top of the bell housing in the rear of the motor.
actually I don't think the 4.2L has one.

warren, check your fusible links coming off the starter relay, you may have a burnt one cutting power to the coil.
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Unread 03-10-2010, 10:41 AM   #4
Que89YJ
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LOL I missed that one! Nope on the 4.2L You are old school! Time to do some mods I think. Time for the nutter bypass upgrade if ignition module is bad. Do they require emission check and vehicle inspections in Winnipeg?
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Unread 03-10-2010, 02:07 PM   #5
w212warren
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no emissions check in winnipeg. found the problem my distrubtor was bad. got lots of spark now it wants to fire up but now i have no fuel going to the carb. what next with this thing!!! it has a brand new fuel filter, also its a mechanical fuel pump on the engine so i dont think i can hear a pump turning on. is there a way to check the fuel pump
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Unread 03-10-2010, 02:13 PM   #6
monkeyhouse
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Originally Posted by w212warren View Post
no emissions check in winnipeg. found the problem my distrubtor was bad. got lots of spark now it wants to fire up but now i have no fuel going to the carb. what next with this thing!!! it has a brand new fuel filter, also its a mechanical fuel pump on the engine so i dont think i can hear a pump turning on. is there a way to check the fuel pump
have you checked the fuel pressure? I think those mechanical pumps like to put out like 7 lbs of pressure. The webers like 3.0 to 3.5 lbs
Holley makes a good fpr for around 30 bucks, if you get it, you'll need to pick up a gauge and fittings.
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Unread 03-10-2010, 03:28 PM   #7
w212warren
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when i pulled the fuel line to the carb and turned the motor over there was little fuel coming out, i will test to see if i got power to the fuel tank then check fuel pressure. i dont think i have a fpr.
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Unread 03-10-2010, 03:37 PM   #8
monkeyhouse
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Originally Posted by w212warren View Post
when i pulled the fuel line to the carb and turned the motor over there was little fuel coming out, i will test to see if i got power to the fuel tank then check fuel pressure. i dont think i have a fpr.
sorry, I don't know why I assumed you have a webber. Are you running the stock carter ?
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Unread 03-10-2010, 04:55 PM   #9
w212warren
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running stock carb. i checked the two relays on passenger side fender i get power on 87 pin or 30 pin one or the other. ok this is where i get lot, i got a mechanical fuel pump on block so the wires running to my fuel tank are for my fuel gauge black wire and a beige wire, also have a orange but it is cut of the connector for some reason. so there is no power on a mechanical pump right! how do i find out if my pump is bad
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Unread 03-10-2010, 05:13 PM   #10
ZeroGravity
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I believe the crankshaft position sensor is actually abbreviated CKS.
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Unread 03-10-2010, 06:45 PM   #11
w212warren
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ordered a new mechanical fuel pump so i will know tomorrow if it will run. dam jeep is a money pit pretty much everything is new, its one thing after another. i have a xj project i want to start so i want this thing to run so project 4.6l stroker can begin
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Unread 03-10-2010, 06:51 PM   #12
Burnerman
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Am I missing something?? A mechanical fuel pump has no wires to it. You need to get a Haynes or Chilton manual. The wires going to your fuel tank are for the fuel gauge. You are using troubleshooting step for a fuel injected system but you have a carbed engine if its a 4.2L and hasn't been converted to FI. Please explain your current engine setup.
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Unread 03-10-2010, 07:05 PM   #13
w212warren
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burner that is what i was say the wires must be for fuel gauge. its a carb and a mechanical fuel pump. just not getting fuel to the carb so i ordered a new pump hope thats the fix
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Unread 03-10-2010, 08:03 PM   #14
monkeyhouse
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Quote:
Originally Posted by w212warren View Post
burner that is what i was say the wires must be for fuel gauge. its a carb and a mechanical fuel pump. just not getting fuel to the carb so i ordered a new pump hope thats the fix
always a good idea, not that expensive and have a tendacy to go bad.
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Unread 03-10-2010, 08:07 PM   #15
green89yj
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You can check the pump by disconnecting a line after the pump and holding it into a bottle while you crank. It should put out a pretty large amount of fuel.
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