Engine dying at operating temp..
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Elder User
Joined: Jul 2003
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From: TEXAS!!!!!!!!!!!!
Engine dying at operating temp..
After my truck hits 160 it dies shortly there after. Then it is harder to start after that unless i let it cool down. I got the following codes with the KOER test,
41:EGO indicates system lean. (I have a hole in the exaust right in front of the o2 sensor i need to weld up when i get my welder back from a buddy.)
13: Cannot control RPM during ER Self-Test low RPM check
73: Insufficient TPS change during dynamic response test
I need some help with this, it sucks being without a truck. Could it be a bad tps?
Oh yea, 1989 f150 w/ 5.0
I would appreciate any help.
edit* I also got a new coil, I figured it could be over heating and cutting out.
41:EGO indicates system lean. (I have a hole in the exaust right in front of the o2 sensor i need to weld up when i get my welder back from a buddy.)
13: Cannot control RPM during ER Self-Test low RPM check
73: Insufficient TPS change during dynamic response test
I need some help with this, it sucks being without a truck. Could it be a bad tps?
Oh yea, 1989 f150 w/ 5.0
I would appreciate any help.
edit* I also got a new coil, I figured it could be over heating and cutting out.
Last edited by drewcoolness99; Mar 24, 2005 at 03:31 PM.
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Joined: Jun 2004
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From: B/CS, Texas!!
Code 73 is means that during the KOER test, you didn't stomp the gas after that one single flash.
Code 13: I have this same code, but cannot find the solution. Some things are vacuum leaks, IAC Valve, timing.
Code 41: This is what probably causes the stall. The PCM doesn't care about O2 sensor readings until the engine is warmed up. So, in your case, once the engine warms up and PCM reads O2 Sensor values, it reads very Lean because the hole in your exhaust is letting Oxygen in. After seeing a LEAN condition, PCM enriches the mixture so much as to probably stall the engine.
My suggestion, fix that hole
. Hope this helps.
Code 13: I have this same code, but cannot find the solution. Some things are vacuum leaks, IAC Valve, timing.
Code 41: This is what probably causes the stall. The PCM doesn't care about O2 sensor readings until the engine is warmed up. So, in your case, once the engine warms up and PCM reads O2 Sensor values, it reads very Lean because the hole in your exhaust is letting Oxygen in. After seeing a LEAN condition, PCM enriches the mixture so much as to probably stall the engine.
My suggestion, fix that hole
. Hope this helps.
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Elder User
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From: TEXAS!!!!!!!!!!!!
I really hope your right, I'll bet my welder back from my buddy and i'll fix it asap. But why would it run fine for 20 minutes then die though? According from what i read it is supposed to kick over into open loop mode like 2 or 3 minutes into it.
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Elder User
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From: TEXAS!!!!!!!!!!!!
well, I went and got a fuel pressure guage. I couldn't get the welder back right then. I hooked it up and get a consistant 30psi then about half a second before it sputters and dies it goes down to 20 then 15 then dies. Any ideas?
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Bad fuel pump or regulator. Possibly clogged fuel filter. 30 PSI at idle is a little low, but acceptable. You can consider this a "floor", fuel pressure shoul never be below this. 30 PSI with the key on engine off is too low, as the high manifold pressure should result in a fuel pressure of about 38 to 39 PSI, due to the action of the regulator.
20 PSI is way too low. And 15 PSI is off the chart. Fuel injected is proportional to the square root of fuel pressure. At 15 PSI you will have about 70% of the correct amount of fuel. If the computer was trying for 14.7:1 A/F ratio, you will get 21:1 instead. 21:1 is below the lean misfire limit, so the engine sputters and dies.
Low fuel pressure can lead directly to code 41, because the mixture is too lean.
20 PSI is way too low. And 15 PSI is off the chart. Fuel injected is proportional to the square root of fuel pressure. At 15 PSI you will have about 70% of the correct amount of fuel. If the computer was trying for 14.7:1 A/F ratio, you will get 21:1 instead. 21:1 is below the lean misfire limit, so the engine sputters and dies.
Low fuel pressure can lead directly to code 41, because the mixture is too lean.
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Originally Posted by drewcoolness99
I put on a new pump, regulator and filter. What else shoudl i look at?