Forums
New posts
Search forums
Image search
Shop
Amazon Store
T-Shirts
Stickers
Members
Current visitors
Supporting Member Upgrade
Sponsors
About
Log in
Register
Search
Search titles only
By:
Search titles only
By:
New posts
Search forums
Image search
Search
Search titles only
By:
Search titles only
By:
Menu
Install the app
Install
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Forums
Jeep Wrangler YJ
YJ General Discussion
Non starting after new thermostat and heater core flush
Reply to thread
Message
<blockquote data-quote="deadpool1" data-source="post: 441126" data-attributes="member: 21229"><p>step 23b is wrong and spark is first the EFI brain called PCM cuts all fueling if spark is detected by IT is bad in any way shape or form to prevent, crash and burn. DOT laws here dictate that. act. The programming does that deep inside the PCM.</p><p>PCM/ECM/ECU etc.</p><p>once fuses are all good , in cab and in the engine bay</p><p>all fuseable links too , I think 3 there,</p><p></p><p></p><p>never fix old cars lacking the FSM. after all it is free. and has full schematics in the car using car code 80 only. 80= wrangler.</p><p>spark is dead</p><p>but chapter 8D page 42 shows testing spark directly at the HV coil and the connector to the primary conn, snaps on and loves to fail.rusted.</p><p></p><p> </p><p></p><p>I will assume the engine and all EFI goodies are stock not , huge modifications and swaps, no photos of you engine presented. </p><p></p><p>I do not know how to go DTC errors on a renix, sold mine, 1995, 88 to 99 owned and the bought a 99.</p><p>renix does not store code only life ones, (or the reverse I forget)</p><p>I have scan tool that works but is costly to buy. for 88 renix.</p><p></p><p></p><p>this car has ICM model for spark. 89</p><p>at fire wall near battery. chapter 8w-106 (page 106)</p><p>this is TBI fueled, TBI means throttle body injected with 1 injector, (my two 88 cherrokee had it and the wild RENIX french ECU)</p><p>when it cranks, try to press 5% throttle ,to hide a<strong> dead IAC valve </strong>(idle air valve) mine stuck ever 10,000 miles for 250,000 miles owned. I have cure.</p><p>using dry lube gun oil spray, that looks like teflon sprayed the tip when dry.</p><p>the engine needs air to start if the spark tips drip fuel bingo this ,</p><p>no air no start and will want to flood. RENIX horrors well know.</p><p>the silly spark coil with the inane horse shoe , spark coil 2 connector , thing fails. they never last this long so , there you are. replace it if it looks</p><p>old, looks bent, warped or the contacts are rusty junk.</p><p>the fSM is free if you google for it. 1989 jeep wrangle factory service manual (not fake ,but real, no chilton stuff wanted)</p><p></p><p>test 30 was no spark !</p><p>so its a no spark engine.</p><p>and that takes work to find on any RENIX french ECU.</p><p>the coil needs power. 12vdc on the lug that is for 12vdc.</p><p>the horse shoe spark coil connector loves to fail, replace it if it looks old is a best Idea. warped or rusty.</p><p></p><p>the manual is hard to follow then as they mix or 2 or 3 engines in one book. code 80 2.5 L is it. all else is wrong. (some fuse pages are in common)</p><p>the 02 sensor if it shorts out, its heater as it loves to do will blow up power fuses to the ICM</p><p></p><p>ICM pin A is 12vdc key ohn.< B= ground,black.</p><p>C= tachometer out.</p><p>d = orange is. (not sure me its function)</p><p>the other wire ICM is coil lead to distributor.so it say. the ICM drives the coil if ICM fails there can not be any spark.</p><p>right rear of engine right side, ground large must be good or EFI goes dead</p><p>spark test at the spark plugs all 4 dead we check spark at the HV spark coil next the same way.</p><p>this ICM and coil both need power and all grounds relate good.</p><p>power in electronics means power and ground both or there and good, or gets no flow of current if either is failing, (rust happens)</p><p>I do not like RENIX in fact from 1999 ive tried hard to forget its horrors, for sure the DTC limits are bad to the bone.</p><p></p><p></p><p></p><p>if 35years old it warps and all 4 pins rust, 2 here and 2 on the coil brass turns green and fails</p><p>[ATTACH=full]122488[/ATTACH]</p><p></p><p></p><p></p><p></p><p>[ATTACH=full]122489[/ATTACH]</p><p></p><p>these are excerpts from the FSM.</p><p>Renix may still be good. so must be the distributor, that pulses it.</p></blockquote><p></p>
[QUOTE="deadpool1, post: 441126, member: 21229"] step 23b is wrong and spark is first the EFI brain called PCM cuts all fueling if spark is detected by IT is bad in any way shape or form to prevent, crash and burn. DOT laws here dictate that. act. The programming does that deep inside the PCM. PCM/ECM/ECU etc. once fuses are all good , in cab and in the engine bay all fuseable links too , I think 3 there, never fix old cars lacking the FSM. after all it is free. and has full schematics in the car using car code 80 only. 80= wrangler. spark is dead but chapter 8D page 42 shows testing spark directly at the HV coil and the connector to the primary conn, snaps on and loves to fail.rusted. I will assume the engine and all EFI goodies are stock not , huge modifications and swaps, no photos of you engine presented. I do not know how to go DTC errors on a renix, sold mine, 1995, 88 to 99 owned and the bought a 99. renix does not store code only life ones, (or the reverse I forget) I have scan tool that works but is costly to buy. for 88 renix. this car has ICM model for spark. 89 at fire wall near battery. chapter 8w-106 (page 106) this is TBI fueled, TBI means throttle body injected with 1 injector, (my two 88 cherrokee had it and the wild RENIX french ECU) when it cranks, try to press 5% throttle ,to hide a[B] dead IAC valve [/B](idle air valve) mine stuck ever 10,000 miles for 250,000 miles owned. I have cure. using dry lube gun oil spray, that looks like teflon sprayed the tip when dry. the engine needs air to start if the spark tips drip fuel bingo this , no air no start and will want to flood. RENIX horrors well know. the silly spark coil with the inane horse shoe , spark coil 2 connector , thing fails. they never last this long so , there you are. replace it if it looks old, looks bent, warped or the contacts are rusty junk. the fSM is free if you google for it. 1989 jeep wrangle factory service manual (not fake ,but real, no chilton stuff wanted) test 30 was no spark ! so its a no spark engine. and that takes work to find on any RENIX french ECU. the coil needs power. 12vdc on the lug that is for 12vdc. the horse shoe spark coil connector loves to fail, replace it if it looks old is a best Idea. warped or rusty. the manual is hard to follow then as they mix or 2 or 3 engines in one book. code 80 2.5 L is it. all else is wrong. (some fuse pages are in common) the 02 sensor if it shorts out, its heater as it loves to do will blow up power fuses to the ICM ICM pin A is 12vdc key ohn.< B= ground,black. C= tachometer out. d = orange is. (not sure me its function) the other wire ICM is coil lead to distributor.so it say. the ICM drives the coil if ICM fails there can not be any spark. right rear of engine right side, ground large must be good or EFI goes dead spark test at the spark plugs all 4 dead we check spark at the HV spark coil next the same way. this ICM and coil both need power and all grounds relate good. power in electronics means power and ground both or there and good, or gets no flow of current if either is failing, (rust happens) I do not like RENIX in fact from 1999 ive tried hard to forget its horrors, for sure the DTC limits are bad to the bone. if 35years old it warps and all 4 pins rust, 2 here and 2 on the coil brass turns green and fails [ATTACH type="full"]122488[/ATTACH] [ATTACH type="full"]122489[/ATTACH] these are excerpts from the FSM. Renix may still be good. so must be the distributor, that pulses it. [/QUOTE]
Verification
Post reply
Forums
Jeep Wrangler YJ
YJ General Discussion
Non starting after new thermostat and heater core flush
Top
Bottom