Will not start

Tiny
EHRACING67
  • MEMBER
  • 2001 GMC SAVANA
  • V8
  • 2WD
  • AUTOMATIC
  • 80,000 MILES
After rain will not start. Good Spark from coil, and wires. No fouled plugs. No moisture in computer area. Good fuel pressure at throttle body. Could the crankshaft position sensor keep it from starting? It turns over, and sounds as if trying for a second then no catch.
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Thursday, October 28th, 2010 AT 2:42 PM

17 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Did you use a gage and check fuel pressure? What is the fuel pressure spec? Do you have an injector pulse?

Any applicable trouble codes? How about your security system? Passlock is an injector disable.
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Friday, October 29th, 2010 AT 2:14 PM
Tiny
EHRACING67
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62 psi fuel pressure on rail, good spark. Passlock is now gone from van. Still will not start after rain. Found some moisture on ecm under hood, but none inside connections. Everything else is dry. Still will not start
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Monday, March 7th, 2011 AT 4:10 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
If it will crank, have a helper crank it, while you check for spark at the spark plugs? If you have the spider fuel system, the fuel poppets may need cleaning? Any way you can check for applicable trouble codes? At the least, you need an obd 2 code reader.
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Monday, March 7th, 2011 AT 4:43 PM
Tiny
EHRACING67
  • MEMBER
  • 3 POSTS
Nice thing about a van, remove doghouse and engine is in your lap. Using spark tester to good ground, have good spark at all eight plugs. Will not have an obd2 reader till tomorrow. As it sits, it seems to be trying harder to start. It now gulps and a little backfire and diesels for abit before shuting down.
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Monday, March 7th, 2011 AT 5:05 PM
Tiny
JDL
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You may have to do a compression test.

Try some seafoam, follow the directions.
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Monday, March 7th, 2011 AT 5:45 PM
Tiny
RONALD THOMPSON
  • MEMBER
  • 8 POSTS
These vehicles have issues with the distributor. The cap gets corrosion on the contacts due to moisture buildup inside the distributor. There's a bulletin on this issue. Replace the cap and rotor if cleaning the contacts doesn't get you going. The bulletin recommends popping out the screened vents for better air circulation.
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+2
Wednesday, August 7th, 2019 AT 6:42 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,468 POSTS
Excellent addition to this thread! Please feel free to help out whenever you are on the site :)
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Saturday, August 10th, 2019 AT 2:14 PM
Tiny
CAMOSS31
  • MEMBER
  • 4 POSTS
  • 2001 GMC SAVANA
  • 100,000 MILES
Friends in Florida on vacation and when they got here they had issues it gave a p0300 and bad mass airflow replaced mass airflow and started up fine once it reached operating temp stumbles and hard to restart noticed black soot and smoke from exhaust and smell that it was rich took a fuel pressure reading and turn key on it jumps to 100 then after a while goes down a bit but if I do get it started it would max out over 100 and not even idle properly. I Assumed the fuel regulator was bad so I got a new one. Looked a lil Different (all they had avl). But it crossed part number with others that Matched the old one put it in and now I hardly get a stumble then a lil back fire in the Throttle body or intake plenum kinda a bellow sounding swoosh. Also While cranking at night I noticed wires arcing to anything they could wire to wire, wire to metal and Possibly some under the dist. Not sure if this is another Issue or the Original one also before they left Ohio they replaced fuel pump, and filter also recently replaced are plugs and wires plugs Just the other day again due to the amounts of build up and Recent mileage.
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Saturday, August 10th, 2019 AT 2:15 PM (Merged)
Tiny
HMAC300
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Scan for codes afuel pressure V6-60-66psi V85.0&5.7 55-60 psi was correct pump installed? And it shouldn't arc plug wires
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Saturday, August 10th, 2019 AT 2:15 PM (Merged)
Tiny
CAMOSS31
  • MEMBER
  • 4 POSTS
Pressure is good now adjusted timing and cleaned wires to cure arcing still No start and no codes. Going to pull and clean plugs and check to see if vapor lock Occurred. Out side that still unsure of where to go from there.
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Saturday, August 10th, 2019 AT 2:15 PM (Merged)
Tiny
CAMOSS31
  • MEMBER
  • 4 POSTS
Also cleaning points
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Saturday, August 10th, 2019 AT 2:15 PM (Merged)
Tiny
HMAC300
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Vapor lock should be non existent with an electric fuelpump. Check crank and cam sensors for resistance they can go and not give a code if it's high. Have the ignition module checked at auto parts. Check ecm fuses and ign fuse in underhood fuseblock clean ground at left front of engine. What engine is in this?
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Saturday, August 10th, 2019 AT 2:15 PM (Merged)
Tiny
CAMOSS31
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  • 4 POSTS
5.7 liter what should the resistant be? If 0 or infinity than they are bad Correct?
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Saturday, August 10th, 2019 AT 2:15 PM (Merged)
Tiny
JASON HILL
  • MEMBER
  • 2 POSTS
  • 2001 GMC SAVANA
  • V8
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
20001 gmc savana van- if the red lights on the dash light up the truck will start otherwise it wont. Have to work with key off and on to get them on. It is getting worse, what can I do?
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Saturday, August 10th, 2019 AT 2:15 PM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
You're going to have to access the ignition switch and test the outputs when the problem is present.
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Saturday, August 10th, 2019 AT 2:15 PM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,606 POSTS
They shod have between 200-1000 ohms or around there see what one has at an auto parts as we dont' really have specs for that.
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Saturday, August 10th, 2019 AT 2:15 PM (Merged)
Tiny
JASON HILL
  • MEMBER
  • 2 POSTS
Thanks
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Saturday, August 10th, 2019 AT 2:15 PM (Merged)

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