Vacuum pump interaction with E4OD Trans?
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Joined: Apr 2013
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Vacuum pump interaction with E4OD Trans?
Hey all, just bought my '91 and working on figuring out a bunch of stuff. truck has an E4OD and seems very late to shift - know the trans is electronic but where's the info to shift come from - is one of my vacuum pumps the cause?
Fleet Owner
Joined: Jul 2006
Posts: 20,345
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From: Mi'kma'ki
if your tach and speedo appear to be accurate,then start by checking your tps settings;
https://www.ford-trucks.com/forums/1...ions-only.html
https://www.ford-trucks.com/forums/1...ions-only.html
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New User
Joined: Apr 2013
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was told by the seller - speedo was off by about 5mph - haven't driven it enough to check although the tach is way off. am diagnosing multiple issues - rough/no idle etc. thought the tach (lack thereof) was due to the idle and hard start which I attributed to the injector caps leaking/sucking air. read the thread about checking gp's yesterday - so need to ease on in as time allows with basic understandings first. gp relay has melt marks around where the smaller wires come out the side - was planning on buying the gp kit from Accurate Diesel ($152) later today which includes the relay (although need to check the brand of gp - seems you all recommend the Beru. thx guys
i ain't rite
Joined: Mar 2005
Posts: 65,447
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From: Marlboro Mental Hospital.
i am not positive, but i am pretty sure the accurate diesel kit comes with diesel rx/wellman plugs.
rock auto has the relay for $75:
RockAuto Parts Catalog
and XD-9 glow plugs for $9.96 each:
MOTORCRAFT Part # ZD9
rock auto has the relay for $75:
RockAuto Parts Catalog
and XD-9 glow plugs for $9.96 each:
MOTORCRAFT Part # ZD9
Posting Guru
Joined: Dec 2012
Posts: 1,065
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From: western washington
VSS vehicle speed sensor is on the speedo cable on 90-91 e40d's, and TPS throttle position sensor, is on IP linkage, is ajustable however is sensitive, ther is some links to procedures on tps some where...
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