I just bought an 87 bonneville it cranks but won't start 93,000 miles new crank senser new coils new idle pos senser

Have you checked for codes?

http://www.lesabret.com/phpBB/viewtopic.php?t=1201

are you getting any fuel in the fuel rail.?

also have you checked the starter or the ignition coil module...?

What kind of "no start" is it? Just purely cranking? Is it stumbling? Wanting to catch but doesn't?

Check for fuel pressure at the rail. Check resistance of coils.

I havn't checked it for codes its getting fuel just no spark it ran fine I shut it off and hasn't started since it cranks and cranks every once and a while gives alittle sputter

I checked for codes the only one was the 12

Check all the fuses - there'* some under the dash on the passenger side also.

Remove the coils, ICM & mounting plate from the mounting bracket. Clean the corrosion off the top of the bracket, both sides of the mounting plate & bottom of the ICM. Apply a little dielectric grease to all four sufaces & reassemble.

Let us know what you find. Do you have a voltmeter?

I'm getting fuel to the fuel rail I tried starting it in nuetral it does nothing except the temp gage goes all the way up the coils are new and mounting plate are clean the person I bought it from said before it died it was losing power it was bogging down on the highway when he hit the gas

I do have a voltmeter

Sounds like a weak/dead fuel pump to me.

Have you put a fuel pressure gauge on it? You should get about 40 lbs of pressure after the pump primes.