Won't start!


Asked by Mar 21, 2013 at 11:37 AM about the 2007 Cadillac DTS

Question type: Maintenance & Repair

2007 Cadi DTS 4.6. Did some repair work, never disconnected any major wires, only battery. ran rough before now won't start. Tried everything I know. HELP!!!!!

11 Answers

what got repaired? something electrical?

2 out of 2 people think this is helpful.

no electrical. replaced chain guides.

1 out of 1 people think this is helpful.

Check power to the coil...let's not panic. Start with the basics, air, fuel, spark and spark timing- We've got air, fuel?, spark? timing? need a few more clues, perhaps if you hooked one of those low-budge diagnostic scanners on there, we could find out if what you did had any effect, or it ALWAYS had say, a plugged cat or crank angle sensor connector fallen off etc. help us out here-

1 out of 1 people think this is helpful.

which chains? timing chain?


checked all the obvious. yes timing chain guide


It ran before , now just turns over.

James Ramond

in engine valley is knock sensor this is ,also the distributor sensor about 40$ could it be the problem from day one ?


chain guide and tentioner broke and was making a racket.

can't be....chain out of position? ouch.


If the tensioner broke, the chain may have jumped a tooth or two. Did you check the cam timing? -- I had a Jeep Cherokee that do that. Idled rough and no power at all.

may be able to relax slowly piece it back together correctly, chain drives the oil pump on a 22R, mine was partially busted but provides enough oil pressure, maybe your catastrophe left you in a comprimized condition.

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