dhcj2011 Posted September 23, 2011 Report Share Posted September 23, 2011 Hi I have recently purchased a 1990 cadillac fleetwood...only has 104,000 miles on the car...it is in the shop now to start I was getting an E 53 code...items replaced are as fallows...egr valve fpr, throttle body, rebuilt distributor, Ecu, cadilidic converter, 6 fuel injectors, plugs wires cap rotor , fuel filter...im stumped as is my machanic...idle is perfect fuel pressure is great but have no power at all....flooring it teking at minimum 15 seconds to reach 30 mph...not good considering it is A 4.5 liter...any help would be great thqnk you in advance Link to comment Share on other sites More sharing options...
KHE Posted September 23, 2011 Report Share Posted September 23, 2011 The E 53 code is for the distributor signal. Check the wiring in the distributor to make sure it is not corroded at the connector plugs. There is a cam sensor on the distributor assembly - I can't recall if the distrubutor needs to be removed to access that but it is common for those contacts to become corroded also after 21+ years. Kevin '93 Fleetwood Brougham '05 Deville '04 Deville 2013 Silverado Z71 Link to comment Share on other sites More sharing options...
dhcj2011 Posted September 23, 2011 Author Report Share Posted September 23, 2011 The E 53 code is for the distributor signal. Check the wiring in the distributor to make sure it is not corroded at the connector plugs. There is a cam sensor on the distributor assembly - I can't recall if the distrubutor needs to be removed to access that but it is common for those contacts to become corroded also after 21+ years. Thanks kevin the wiring looks good and everything inside the distributor is brand new....i was told by machanic the obd1 is not that accurate so he wants to checkother things...could it possibly be map sensor or o2 sensor without throwing a code? Link to comment Share on other sites More sharing options...
KHE Posted September 23, 2011 Report Share Posted September 23, 2011 Thanks kevin the wiring looks good and everything inside the distributor is brand new....i was told by machanic the obd1 is not that accurate so he wants to checkother things...could it possibly be map sensor or o2 sensor without throwing a code? If you have access to a service manual, I would start troubleshooting the E53 code. I don't buy the "OBD-1 is not accurate" answer from the mechanic... Kevin '93 Fleetwood Brougham '05 Deville '04 Deville 2013 Silverado Z71 Link to comment Share on other sites More sharing options...
dhcj2011 Posted September 23, 2011 Author Report Share Posted September 23, 2011 After doing more trouble shooting ive noticed computer is getting extremely hot...the harness is probably the issue....there are three plugs on computer wich is for the distributor... Link to comment Share on other sites More sharing options...
dhcj2011 Posted September 23, 2011 Author Report Share Posted September 23, 2011 By the way your help is more appreciated than u know thanks Link to comment Share on other sites More sharing options...
dhcj2011 Posted September 23, 2011 Author Report Share Posted September 23, 2011 The obd1 not being accurate im not buying it either Link to comment Share on other sites More sharing options...
dhcj2011 Posted September 23, 2011 Author Report Share Posted September 23, 2011 With as beautifly as this 4.5 liter is idling im hopeing to get it running to its full potential soon Link to comment Share on other sites More sharing options...
BodybyFisher Posted September 24, 2011 Report Share Posted September 24, 2011 Don't assume its the harness, it could be a bad computer/PCM/ECM, Read this http://www.niehoff.com/techtips/19taptest.html 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 Link to comment Share on other sites More sharing options...
dhcj2011 Posted September 24, 2011 Author Report Share Posted September 24, 2011 Computer is new...less than two weeks old Link to comment Share on other sites More sharing options...
KHE Posted September 24, 2011 Report Share Posted September 24, 2011 The computer amy get hot - not a big deal. Get a factory service manual and start troubleshooting the E53 code and I am confident you'll solve the problem. Kevin '93 Fleetwood Brougham '05 Deville '04 Deville 2013 Silverado Z71 Link to comment Share on other sites More sharing options...
dhcj2011 Posted September 24, 2011 Author Report Share Posted September 24, 2011 Yep the only other thing I havent changed is the harness...let ya know how it goes tomorrow with any luck Link to comment Share on other sites More sharing options...
rockfangd Posted September 24, 2011 Report Share Posted September 24, 2011 OBD1 is accurate. It may not be as sensitive as obd2 but it still senses the problem and identifies it. I recommend inspecting the harness to the distributor. Look at the wires an plugs very closely GM FAN FOREVER Nice, clean, luxury= fine automobile Link to comment Share on other sites More sharing options...
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