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Change head gaskets will nto start


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hey body, i have taken the front cover off and got all my timming mark alined cleaned all plugs it start but i am getting to much gas all my plugs and wires are hooked up my crank are in the right order the one with the curve on top the strige one in the middle yhe oil on the bottom my fan , temp, oil,fill for the radater, all oil are in antfrezz, now what did i miss . yes i pulled the codes again and i got this pc-101,pc-300-c pc-1108.pc1376,pc-1520, pc-1599 -all h ip1552-,ip-2780 tc -61, rs-16 rs-34, rs-60 pz-1558 pz-1971,1982,2016, rf 2560.if you have seen this problem let me know how to fix it thanks ftime.!!1996 sts...

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  • 2 weeks later...

hey body i need a little more help, this is on the 1996 sts i have put a new maf,new wires ,plugs check timming check fpr, clear all codes and it still runns ruff what eles can i look at .my compression are goob on all clyders. if so can i have a bent val on my heads. thanks ftime!!!

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hey body i need a little more help, this is on the 1996 sts i have put a new maf,new wires ,plugs check timming check fpr, clear all codes and it still runns ruff what eles can i look at .my compression are goob on all clyders. if so can i have a bent val on my heads. thanks ftime!!!

Members more familiar with head gasket problem will chime in, but this is an interference engine, here is an article about it

http://www.autoeducation.com/blog/item/2/

If you had the timing wrong its possible that you bent valves, but you said above all cylinders were at 190, is that correct?

Please be more detailed in your responses.

Explain to us how your timing was off and how you fixed it and how you determined it is NOW correct, ok?

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Earler, you stated that you had low compression on one bank - that is what lead me to think you had one timing chain not in the correct positon and that the valves were bent. Later, you said all cylinders were 190 psi. If all cylinders are 190 psi, then I would think the valves are OK.

Did the engine run smoothly prior to the headgasket job?

You need to determine what cylinder(s) are misfiring. You could swap out one of the coils and substitute one new coil in each of the four locations until you find the coil that is causing the problem. If the coils are OK, you could unplug and plug back in the injectors one at a time until you find the cylinder(s) that show no RPM drop when unplugged. Those cylinders will be the misfiring cylinder(s).

A Tech-2 scanner would also identify the missing cylinder(s) but you would need to take the car to a shop.

Kevin
'93 Fleetwood Brougham
'05 Deville
'04 Deville
2013 Silverado Z71

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