1999 Cadillac Catera no spark

Tiny
LILTANK86
  • MEMBER
  • 1999 CADILLAC CATERA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 63,000 MILES
Ok my car turns over fuel is being pump into the engine but I am not getting a spark. This car has a wierd ingtion system to me. It has no spark plug wires just a copper wire with a rubber boot around it and the coil pak and igintion moudle control unit are 1 peiece that connects all the plugs, Example (2, 4, 6 has one coil pak/1, 3, 5 has the other coil pak. I just need help to see where the ingition moudule control unit will get its power from, ohh and I replaced both imcu
Monday, June 8th, 2009 AT 6:48 PM

1 Reply

Tiny
FACTORYJACK
  • MECHANIC
  • 4,159 POSTS
By fuel being pumped into the engine, are you just meaning that you have fuel pressure? Do you know if you have an injector pulse? My guess first of all would be the crankshaft position sensor. There is a three wire connector on the same plastic bracket that the injector connector resides(rear of left cylinder head). On the sensor side you should have a resistance of approx 950 ohms between pins A and C(outboard terminals). Check for continuity on any if A and C are open(a to b/b to c), I'm not 100% certain of the combo. If you have no continuity, or high resistance, replace the crank sensor. If you have the resource, check for a P0335 stored in ecm, that is for crank sensor signal, and would be a smoking gun.
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Monday, June 8th, 2009 AT 11:12 PM

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An en­gine's ig­ni­tion sys­tem is re­spon­si­ble for ig­nit­ing the fuel-air mix­ture in­side the com­bus­tion cham­ber and when the ig­ni­tion process stops the en­gine will not run....