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mac3881
User
May 14, 2016, 5:49 PM
Post #1 of 19
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needing help
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89 chevy s10 with a 2.5 5 speed i drove it in to the garage to change the clutch and flywheel did that now i dont get the fuel pump to run ive put in a new pump and ecm still nothing the old ecm was blowing fuses switched relay
(edit typo in subject line)
(This post was edited by Tom Greenleaf on May 16, 2016, 12:55 PM)
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Discretesignals
Ultimate Carjunky
/ Moderator
May 14, 2016, 6:40 PM
Post #2 of 19
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Re: neeing help
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All this started after you did a clutch job? Which fuses were blowing?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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mac3881
User
May 14, 2016, 6:43 PM
Post #3 of 19
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Re: neeing help
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ecmb yes after
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Discretesignals
Ultimate Carjunky
/ Moderator
May 14, 2016, 6:47 PM
Post #4 of 19
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Re: neeing help
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Have you inspected the harness that runs around and near the transmission and bell housing? Maybe you got one pinch or damaged an electrical harness. Do a really good visual inspection under there.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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mac3881
User
May 14, 2016, 6:51 PM
Post #5 of 19
(3642 views)
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Re: neeing help
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yes ive checked the wires and the plugs that went on the t5 trans even checked the wires that run down the driver side of the frame
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Discretesignals
Ultimate Carjunky
/ Moderator
May 14, 2016, 7:08 PM
Post #6 of 19
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Re: neeing help
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Never seen an ECM and fuel pump go bad right after a clutch job.
ECM B is used to protect the circuit for the fuel pump. Is that fuse still blowing? Did you install the same rating fuse(10 amp)? When you turn the ignition on, does the fuel pump relay click on for a few seconds and then click off?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on May 14, 2016, 7:10 PM)
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mac3881
User
May 14, 2016, 7:10 PM
Post #7 of 19
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Re: neeing help
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its not blowing anymore and dont hear relay clicking
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Discretesignals
Ultimate Carjunky
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May 14, 2016, 7:11 PM
Post #8 of 19
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Re: neeing help
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Using a 12 volt test light or volt meter do you have battery voltage at the ECM B fuse with the ignition on?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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mac3881
User
May 14, 2016, 7:13 PM
Post #9 of 19
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Re: neeing help
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i navent checked yet will do that monday as well put a new relay in
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Discretesignals
Ultimate Carjunky
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May 14, 2016, 7:16 PM
Post #10 of 19
(3627 views)
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Re: neeing help
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Why you installing parts? You haven't even figured out what is wrong. Where did you get the replacement ECM? ECMs don't go bad after you do a clutch job.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on May 14, 2016, 7:19 PM)
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mac3881
User
May 14, 2016, 7:18 PM
Post #11 of 19
(3621 views)
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Re: neeing help
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junk yard got it for 40 in case
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Discretesignals
Ultimate Carjunky
/ Moderator
May 14, 2016, 7:20 PM
Post #12 of 19
(3620 views)
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Re: neeing help
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When you turn the ignition on does the check engine light come on? Any trouble codes stored if the check engine light is working?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on May 14, 2016, 7:21 PM)
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mac3881
User
May 14, 2016, 7:21 PM
Post #13 of 19
(3616 views)
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Re: neeing help
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no and no code either
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Discretesignals
Ultimate Carjunky
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May 14, 2016, 7:32 PM
Post #14 of 19
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Re: neeing help
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The ECM is supposed to turn the check engine light on for a bulb check when you turn the ignition on. Usually if it doesn't that means the ECM isn't working or the bulb is burned out. The ECM may not be working because it has no power, no ground, or is faulty. Maybe your salvage yard ECM is DOA. Do you still have the old one?
The ECM gets part of its power from the ECM B fuse which is hot all the time. The ECM will send power to the fuel pump relay to energize it. The ECM B fuse on the circuit also feeds power to the pump after the fuel pump relay is turned on. If the ECM turns on the relay and the fuse blows, part of the ECM goes dead and the fuel pump relay doesn't get any power.
What you should do is remove the fuel pump relay and then reinstall your old ECM. Turn the ignition on and see if the fuse blows and make sure the check engine light comes on and the ECM flashes 12. If the fuse doesn't blow it is probably blowing after the relay is turn on which means you have a short somewhere after the relay. Still have a gut feeling that wiring got damaged and shorted to ground during your clutch job.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on May 14, 2016, 7:35 PM)
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mac3881
User
May 14, 2016, 7:35 PM
Post #15 of 19
(3607 views)
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Re: neeing help
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yes i have the old one ok ill try that monday
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Discretesignals
Ultimate Carjunky
/ Moderator
May 14, 2016, 7:37 PM
Post #16 of 19
(3606 views)
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Re: neeing help
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Let us know what you find out. Make sure that you have a 10 amp fuse installed. If you put higher rated fuses in there, it may burn up wiring. The fuses are rated to protect the wiring.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on May 14, 2016, 7:38 PM)
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mac3881
User
May 14, 2016, 7:38 PM
Post #17 of 19
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Re: neeing help
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i will
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mac3881
User
May 16, 2016, 12:26 PM
Post #18 of 19
(3570 views)
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Re: neeing help
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i fixed it it was a pinched wire it was under the cross member thanks for the help
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Discretesignals
Ultimate Carjunky
/ Moderator
May 16, 2016, 3:17 PM
Post #19 of 19
(3560 views)
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Re: needing help
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Glad to read you got it figured out. Thanks for following up. 
Closed as solved. Can be reopened upon request by the OP.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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