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Shudder miss '87

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Old 09-06-2017, 06:59 PM   #1
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Default Shudder miss '87

Got an 87 f150 with 4.9 smog pump deleted. I had another tread going but it was in >drivetrain and wanted more exposure. Didn't find a solution.

Brought the baby home the other week and it was running fine. The next morning went to start it and it was shaking and didn't have any power. So I brought it back home.
Replaced plug, wires, cap, rotor, fuel filter. Checked fuel pressure. Was about 45-46 cold idle, and got it to 56 giving it some throttle. Checked for vacuum leaks with carb cleaner. Didn't find any. Ohmed coil. Idk specs but have those numbers.

Checked compression like 2 weeks prior and it was all good.
Here's old thread. https://www.f150forum.com/f89/ol-red-ashakin-391118/

Got compression, air and spark. Thinking it must be fuel

​​​​​​​At this point I'm thinking injectors are clogged because of old fuel filter contents, it was black and... Idk coffeeish?
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Old 09-08-2017, 06:27 AM   #2
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Another quick check: make sure your EGR valve isn't stuck open. Might even try a quick whack to it with a hammer. These can be a pain to get off.
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Old 09-08-2017, 08:34 AM   #3
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As of now I have the intake partially disassembled trying to get to injectors. The egr tube is rusted on. Probably gonna bust it, install a block off plate.
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Old 09-11-2017, 09:49 PM   #4
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Got fuel rail off. Took off the injectors, they came out easier than I expected. Last injectors I helped remove was from an lb7 and we're alot harder lol. Soaked they in B12 chemtool for a day. Rigged up an injector harness to a 9v and blew it out with air. One injector didn't open. Assume I found the culprit.
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