rapid fire spark plugs i ment lol ....

 

fwd...

 

Precise detail and pics? I suggest you purchase a Factory Service Manual from Helm. $75 and in stock. You may find one on ebay for less expense. Helm is the publisher for the factory manual and will pay for itself quickly. The FSM covers everthing from the tread on the bottom of the tires to the top of the roof and every system in between. Do a search for Helm Inc.

 

You need the manual as Dave S Texas suggests. Your car is 20 years old now and I don't know those error codes like I know the OBD II codes used now BUT the EGR code is a typically carbon build up or valve failure. A new EGR (Exhaust Gas Recirculation) valve is not that big a deal to replaceand not expensive but the manual will show you how. Carbon build up in the EGR passages is a bit of a problem but there are top cleaners to do the job. The ones from the GM dealer are probably best but sometimes they won't sell this stuff to the guy on the street because of safety regs., it's nasty chemicals is all. Sometimes you need to remove the intake manifold and manually clean the passages.

Not to bore anyone but the EGR system takes exhaust gases and recirculates them into the intake to be reburned. The EGR valve controls this. The engine is set up for an air fuel charge with these exhaust gases in it and if the system isn't working right it can make the engine stumble, idle badly and run hot. I don't know teh 4.1 system but usually there are pipes or pasages that return the exhaust gases to the intake manifold. These are the things that can get blocked with carbon. The shop manual will show it all.

 

where can i get these manuals and thnx for helping

 

http://www.helminc.com/helm/homepage...A&cp=65001

Start at this link. Many book stroes carry other publisher's manuals as well, and most auto supply stores have them. You can also look on eBay and search "1987 Cadillac shop manual" you may find one.

 

thanx for all of ur help .........

 

You got your performance parts already?How's it going? Keep it posted. I have a new cadillac escalade cold air induction installed which improve the power and add a tuned roar. It was a fun job.Hope to see some of your car pics.

 

have you tried on volant performance parts? my friend had recommended this one to me last week.

 

dodge vortec engines use the same fuel injectors as the 4.1
allows more fuel in combustion chamber the computer and mass air will adjust fuel trim fore you