95 astro hard starting

PLACE ANY ISSUES RELATED TO YOUR VAN NOT STARTING OR STARTING HARD IN HERE.
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waysidefreak
I am merely driving my van
I am merely driving my van
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Joined: Sat Mar 31, 2012 9:05 am

95 astro hard starting

Post by waysidefreak »

I changed the pressure reg and supply and return lines am throwing a 54 code low voltage to fuel pump. changed fuel pump relay no change disconected it after norm operating temp no change. when it sits for 15 min it takes a while to start when the oil pressure reaches 15psi it fires. turn ignition on dont hear pump turn on when i shut it off i hear the pump. wanna know if i should just change the fuel pump or what thanks
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1Gary
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Re: 95 astro hard starting

Post by 1Gary »

1979 Malibu drag race only car
1999 Sonoma 4.3 5 speed-Rufus
1989 Astro-Ole Yellar cancelled-still selling off parts
1985 Astro-shop van R.I.P. my friend
1994 Astro LT RWD W4.3 rod knock RIP
1982 Winnebago single rear wheel-Chevy 350 Scraped 1/28/13-broken dreams......


Rochester,NY

Topic author
waysidefreak
I am merely driving my van
I am merely driving my van
Posts: 4
Joined: Sat Mar 31, 2012 9:05 am

Re: 95 astro hard starting

Post by waysidefreak »

I have a question I am looking in a haynes manual i have a 95 astro and the scematics for the wiring are the 93 and earlier models the 95 should have a red wire to prime the fuel pump mine has the gray wire and has the 4 prong relay and the 95 should have a five prong. If i hook a jumper wire to the prime wire my van starts right up no problem and it shows no codes until i shut it off again and then it shows low voltage to the pump. should i put a new ecm in it or re wire it to make it prime when i turn on ignition.
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1Gary
I have my van tatooed on my cheeks
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Re: 95 astro hard starting

Post by 1Gary »

Just a guess,but how about a bad oil pressure switch not allowing the pump to prime?.
1979 Malibu drag race only car
1999 Sonoma 4.3 5 speed-Rufus
1989 Astro-Ole Yellar cancelled-still selling off parts
1985 Astro-shop van R.I.P. my friend
1994 Astro LT RWD W4.3 rod knock RIP
1982 Winnebago single rear wheel-Chevy 350 Scraped 1/28/13-broken dreams......


Rochester,NY

Topic author
waysidefreak
I am merely driving my van
I am merely driving my van
Posts: 4
Joined: Sat Mar 31, 2012 9:05 am

Re: 95 astro hard starting

Post by waysidefreak »

I replaced that too and when i take relay out it stays running right now i have a toggle hooked up to the prime wire i turn toggle on start with no problem and then turn toggle off has no issues when i do that so its running on oil pressure switch im thinking its got to be a short from ecm to relay or ecm

LiftedAWDAstro
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Location: New Haven, NY

Re: 95 astro hard starting

Post by LiftedAWDAstro »

You may have a burned through wire. The pump should prime with the key selected for on. The ECM is in the right front kick panel correct? Follow the wire bundle from that through the firewall where it crosses over the right engine valve cover. You need to remove the doghouse to do this. If that loom is sitting on the valve cover, it probably has some burnt insulation and wires. Check it out. If all this is ok and both ECM fuses are good, you may need an ECM.
Current rides:
2013 Toyota Tundra DC 4x4
2008 Dodge Nitro 4x4
2005 Nissan Sentra 1.8S Special Edition

Mileage spreadsheet

Vans owned:
1986 Safari 2.5L 4 speed manual - scrapped
1995 Astro 2WD conversion 4.11 posi, shift kit, DHC rock rails - sold to Skippy
1998 Astro 4x4 D44, D60, NP231, full hydraulic system with 9k# Milemarker winch and snow plow - sold to Lockdoc
2003 Astro AWD all stock - traded for a 3/4 ton truck
2005 AWD, 4.10's - sold to skippy

Topic author
waysidefreak
I am merely driving my van
I am merely driving my van
Posts: 4
Joined: Sat Mar 31, 2012 9:05 am

Re: 95 astro hard starting

Post by waysidefreak »

Ok I will check it out and post findings
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