wclegere Posted February 15, 2019 Author Share Posted February 15, 2019 On 2/15/2019 at 1:07 AM, Jeep Driver said: If it is your CPS, this is what you want to find- Expand ok... got it... thanks. If it's that simple I'll kiss your big toe!!! Link to comment Share on other sites More sharing options...
Jeep Driver Posted February 15, 2019 Share Posted February 15, 2019 On 2/15/2019 at 1:09 AM, Green Mesa XJ said: I’m not sure someone isn’t having a laugh. Fuel pressure from the relay? Sent from my iPhone using Tapatalk Pro Expand ????????? Link to comment Share on other sites More sharing options...
Jeep Driver Posted February 15, 2019 Share Posted February 15, 2019 On 2/15/2019 at 1:09 AM, Jeep Driver said: https://www.ebay.com/itm/Jeep-CHRYSLER-OEM-88-90-Cherokee-Vehicle-Speed-Sensor-VSS-33004761/162501870135?hash=item25d5ddc237:g:vCIAAOSw-89ZOMcj:rk:1:pf:1&frcectupt=true Expand Again, new page/ Link to comment Share on other sites More sharing options...
wclegere Posted February 15, 2019 Author Share Posted February 15, 2019 On 2/15/2019 at 1:12 AM, Jeep Driver said: Again, new page/ Expand On 2/15/2019 at 1:12 AM, Jeep Driver said: Again, new page/ Expand On 2/15/2019 at 1:12 AM, Jeep Driver said: Again, new page/ Expand On 2/15/2019 at 1:12 AM, Jeep Driver said: Again, new page/ Expand Link to comment Share on other sites More sharing options...
Green Mesa XJ Posted February 15, 2019 Share Posted February 15, 2019 On 2/15/2019 at 1:11 AM, Jeep Driver said: ????????? It’s what the op said about all the test he ran. No fuel pressure from the relay. He also didn’t do the simple testing suggested earlier Sent from my iPhone using Tapatalk Pro Link to comment Share on other sites More sharing options...
wclegere Posted February 15, 2019 Author Share Posted February 15, 2019 On 2/15/2019 at 1:12 AM, Jeep Driver said: Again, new page/ Expand This is an 86! Does it have a speed sensor? Link to comment Share on other sites More sharing options...
wclegere Posted February 15, 2019 Author Share Posted February 15, 2019 On 2/15/2019 at 1:15 AM, Green Mesa XJ said: It’s what the op said about all the test he ran. No fuel pressure from the relay. He also didn’t do the simple testing suggested earlier Sent from my iPhone using Tapatalk Pro Expand simple testing of what? The CPS was replaced with a new one. Normally when you replace a part you assume it WORKS! Yes? But I guess we all know what happens when we assume...right? I'm just trying to find a reasonable solution to this problem. Link to comment Share on other sites More sharing options...
eaglescout526 Posted February 15, 2019 Share Posted February 15, 2019 On 2/15/2019 at 1:15 AM, wclegere said: This is an 86! Does it have a speed sensor? Expand Chrysler calls the CPS the Speed Sensor. Give these a shot Link to comment Share on other sites More sharing options...
wclegere Posted February 15, 2019 Author Share Posted February 15, 2019 On 2/15/2019 at 1:11 AM, Jeep Driver said: ????????? Expand When we bypassed the relay with a jumper wire in the connector we have plenty of fuel pressure. It's when we connect it all back up that it doesn't seem to work Link to comment Share on other sites More sharing options...
wclegere Posted February 15, 2019 Author Share Posted February 15, 2019 On 2/15/2019 at 1:18 AM, eaglescout526 said: Chrysler calls the CPS the Speed Sensor. Give these a shot Expand Right - thanks. This helps a lot!!! But it also says (in ECU is not switching the injector) "the lamp should "pulse" dimly" - It's NOT pulsing - the noid light is solid dim, not pulsing Link to comment Share on other sites More sharing options...
eaglescout526 Posted February 15, 2019 Share Posted February 15, 2019 On 2/15/2019 at 1:23 AM, wclegere said: Right - thanks. This helps a lot!!! But it also says (in ECU is not switching the injector) "the lamp should "pulse" dimly" - It's NOT pulsing - the noid light is solid dim, not pulsing Expand Welcome. This manual is from '87, noid lights probably did not exist back then and so an ordinary test lamp was used. Then again it could be the same idea. ive never used or heard of a noid light till now. On 2/15/2019 at 1:20 AM, wclegere said: When we bypassed the relay with a jumper wire in the connector we have plenty of fuel pressure. It's when we connect it all back up that it doesn't seem to work Expand Crap shoot. Did you try a new relay by any chance? Link to comment Share on other sites More sharing options...
Green Mesa XJ Posted February 15, 2019 Share Posted February 15, 2019 On 2/15/2019 at 1:20 AM, wclegere said: When we bypassed the relay with a jumper wire in the connector we have plenty of fuel pressure. It's when we connect it all back up that it doesn't seem to work I might just be me but I don’t think your descriptions of problems and test results are very clear. trouble shooting tip posted earlier would give you a clearer idea of what’s not working. Seems like your upset with everyone here because a 32 year old Jeep has some issues. But I may take they way you emphasize certain words differently than others. Aftermarket CPS are pretty much junk. Some fail new out of the box.Sent from my iPhone using Tapatalk Pro Link to comment Share on other sites More sharing options...
wclegere Posted February 15, 2019 Author Share Posted February 15, 2019 On 2/15/2019 at 1:26 AM, eaglescout526 said: Welcome. This manual is from '87, noid lights probably did not exist back then and so an ordinary test lamp was used. Then again it could be the same idea. ive never used or heard of a noid light till now. Crap shoot. Did you try a new relay by any chance? Expand 3 new relays Link to comment Share on other sites More sharing options...
Ωhm Posted February 15, 2019 Share Posted February 15, 2019 When you jumper the relay, try starting the vehicle to see if it will run. Link to comment Share on other sites More sharing options...
eaglescout526 Posted February 15, 2019 Share Posted February 15, 2019 Have you tested the fuel pump our of the tank at all? Or has it been replaced recently? Link to comment Share on other sites More sharing options...
wclegere Posted February 15, 2019 Author Share Posted February 15, 2019 On 2/15/2019 at 1:30 AM, Green Mesa XJ said: I might just be me but I don’t think your descriptions of problems and test results are very clear. trouble shooting tip posted earlier would give you a clearer idea of what’s not working. Seems like your upset with everyone here because a 32 year old Jeep has some issues. But I may take they way you emphasize certain words differently than others. Aftermarket CPS are pretty much junk. Some fail new out of the box. Sent from my iPhone using Tapatalk Pro Expand please tell me how I can make this situation any clearer? I'm all ears. Sorry, a bit frustrated but it really seem these great guys are trying to help me and believe me, I appreciate it. On 2/15/2019 at 1:33 AM, Ωhm said: When you jumper the relay, try starting the vehicle to see if it will run. Expand Well, we had the fuel line disconnected to see if we had fuel pressure and when we bypassed the relay the fuel pump shot fuel across the shop. Link to comment Share on other sites More sharing options...
wclegere Posted February 15, 2019 Author Share Posted February 15, 2019 On 2/15/2019 at 1:36 AM, eaglescout526 said: Have you tested the fuel pump our of the tank at all? Or has it been replaced recently? Expand Yes, the fuel pump is new as is the tank, the lines and the electrical connectors to the pump. Link to comment Share on other sites More sharing options...
wclegere Posted February 15, 2019 Author Share Posted February 15, 2019 What is a WOT switch? Link to comment Share on other sites More sharing options...
Jeep Driver Posted February 15, 2019 Share Posted February 15, 2019 WOT is Wide Open Throttle I don't think you have one. Link to comment Share on other sites More sharing options...
eaglescout526 Posted February 15, 2019 Share Posted February 15, 2019 On 2/15/2019 at 1:42 AM, wclegere said: What is a WOT switch? Expand Looks like this Link to comment Share on other sites More sharing options...
Ωhm Posted February 15, 2019 Share Posted February 15, 2019 On 2/15/2019 at 1:38 AM, wclegere said: Well, we had the fuel line disconnected to see if we had fuel pressure and when we bypassed the relay the fuel pump shot fuel across the shop. Expand With fuel line connected, bypass relay and see if engine will start and run. Link to comment Share on other sites More sharing options...
wclegere Posted February 15, 2019 Author Share Posted February 15, 2019 On 2/15/2019 at 1:44 AM, Jeep Driver said: WOT is Wide Open Throttle I don't think you have one. Expand oh ok Link to comment Share on other sites More sharing options...
wclegere Posted February 15, 2019 Author Share Posted February 15, 2019 There is a sensor on the side of the throttle body. Is that not a throttle positioning sensor? Link to comment Share on other sites More sharing options...
Ωhm Posted February 15, 2019 Share Posted February 15, 2019 Don't recall when it happen, but WOT was replaced with Power Steering Pressure Switch (PSPS). Link to comment Share on other sites More sharing options...
Jeep Driver Posted February 15, 2019 Share Posted February 15, 2019 Yes, you'll have a TPS or throttle position sensor. Link to comment Share on other sites More sharing options...
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