Mekidbrat Posted October 21, 2018 Report Share Posted October 21, 2018 I just brought a 94 Eldorado it idles at 2100rpm. I got the idle to clam down by pretty removing the iac. Now it idle at 1000ish rpm cleaned the throttle body with soapy water and a tooth brush it lowered the rpm little more . I took it for a drive around the block shift extremely hard in drive and reverse. Try to give it full throttle and it bogs around 1500rpm spits and sputters and popping noises out of the exhaust and if you hold the full throttle for 5 secs or so it feels like it going to die trying . There no codes on the computer. Link to comment Share on other sites More sharing options...
Bruce Nunnally Posted October 21, 2018 Report Share Posted October 21, 2018 Welcome. Sounds like you are on the right path -- replace the IAC if it is not functioning; they are a maintenance item. Hard shift can happen with high idle so will want to wait to diagnose. Reference Thread: Reference Thread 2: Reference Thread 3: Bruce 2023 Cadillac CT4-V Blackwing Follow me on: Twitter Instagram Youtube Link to comment Share on other sites More sharing options...
BodybyFisher Posted October 21, 2018 Report Share Posted October 21, 2018 6 hours ago, Mekidbrat said: I just brought a 94 Eldorado it idles at 2100rpm. I got the idle to clam down by pretty removing the iac. Now it idle at 1000ish rpm cleaned the throttle body with soapy water and a tooth brush it lowered the rpm little more . I took it for a drive around the block shift extremely hard in drive and reverse. Try to give it full throttle and it bogs around 1500rpm spits and sputters and popping noises out of the exhaust and if you hold the full throttle for 5 secs or so it feels like it going to die trying . There no codes on the computer. You don't have an IAC on a 94 Eldo. You have an ISC, or Idle Speed Control. I replaced one last year on a 95, here is the thread there are good links in it also 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...
Mekidbrat Posted November 2, 2018 Author Report Share Posted November 2, 2018 So I found out that the fuel rail pressure was a mere 15psi. So I just got the fuel pump I order and replace the fuel pump now it runs just find. But its stuck in 2nd gear. So I pulled the codes Which are as follow No pcm data I022 HISTORY I032 CURRENT I034 CURRENT I052 HISTORY NO ACP CODES NO SIR CODES NO TCS DATA S036 HISTORY S038 CURRENT S044 HISTORY S060 HISTORY S061 HISTORY S064 HISTORY S072 HISTORY S073 HISTORY S076 HISTORY S077 HISTORY My main concern at the I032 and I034 and how to fix those first any ideas would be nice the only thing I can come to is that I need to replace the pcm Link to comment Share on other sites More sharing options...
BodybyFisher Posted November 2, 2018 Report Share Posted November 2, 2018 It is probably bad shift solenoids. I am not sure if you will get a code for them on obd1. Try disconnecting the battery to reboot the system and see if you still get this 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...
Mekidbrat Posted November 2, 2018 Author Report Share Posted November 2, 2018 Disconnecting the battery seems to do nothing for the i032 and I034 codes Link to comment Share on other sites More sharing options...
BodybyFisher Posted November 2, 2018 Report Share Posted November 2, 2018 Try removing and replacing the ECM plugs to reset them. The I034 indicates an ECM problem. With the engine idling do a 'tap test', tap on the ECM/PCM if the engine stumbles it indicates a bad pcm Did you reinstall the ISC motor? See this thread, if resetting the ECM connector doesnt work you may need to replace the ECM 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...
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