no staŕt
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Tuned
Joined: Apr 2006
Posts: 331
Likes: 4
From: grorgetown,in
no staŕt
99 fuel pressure is 70psi while cranking. icp goes to 2300 while cranking. rpms are 180 while cranking. changed ipr and icp. no change no smoke out of pipe while cranking. tried spare idm and pcm. only code is exhaust back pressure sensor. what am I missing? duty cycle is 43% after long crank.
Logistics Pro
Joined: May 2017
Posts: 4,667
Likes: 1,455
From: Muskogee, Ok
Outside temperature where you are?
Fuel tank level?
Oil level?
Wait to start light?
Replaced under dash fuse #30?
Swapped the IDM relay with another non essential relay?
Does it do the buzz test to confirm IDM power when commanded to?
Fuel tank level?
Oil level?
Wait to start light?
Replaced under dash fuse #30?
Swapped the IDM relay with another non essential relay?
Does it do the buzz test to confirm IDM power when commanded to?
Thread Starter
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Tuned
Joined: Apr 2006
Posts: 331
Likes: 4
From: grorgetown,in
oil is good. fuse is good. wts light on injectors all buzz
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Thread Starter
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Tuned
Joined: Apr 2006
Posts: 331
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From: grorgetown,in
it's in a 60 degree shop. buzz test passes
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Thread Starter
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Tuned
Joined: Apr 2006
Posts: 331
Likes: 4
From: grorgetown,in
yea gp are working and it's in a 60 degree shop. put new cps in also
Junior User
Joined: Dec 2021
Posts: 63
Likes: 9
How did u arrive at the no start condition did it die or just not start one day. Any symptoms or issues prior have u had the 42 pin connector disconnected at any point prior. Have u checked your reference voltage on sensors. Have you monitored voltage while cranking have you confirmed icp readings are accurate and not just defaults? What's the condition of the iprs pigtail I've seen the two wires short together within the connector check the back of pigtail where wires go in.
Junior User
Joined: Dec 2021
Posts: 63
Likes: 9
it doesn't just default to 2300 even if disconnected it still would gradually increase based on ipr%. I find looking at icp voltage works for ruling out sensor. Could have ipr issue and duty cycle will climb like it's working even though the valve isn't opening. Same with icp.
Thread Starter
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Tuned
Joined: Apr 2006
Posts: 331
Likes: 4
From: grorgetown,in
How did u arrive at the no start condition did it die or just not start one day. Any symptoms or issues prior have u had the 42 pin connector disconnected at any point prior. Have u checked your reference voltage on sensors. Have you monitored voltage while cranking have you confirmed icp readings are accurate and not just defaults? What's the condition of the iprs pigtail I've seen the two wires short together within the connector check the back of pigtail where wires go in.