 Fuel Pump Install Help |
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 Apr 18 2006, 08:05 PM
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#41
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DSM Tech Wizard  Group: Members Posts: 2,256 Joined: 10-January 01 From: central IL Member No.: 10  |
Are the fuel injectors new or used? Have they been sitting around long? I know Spy had a problem with a set of cleaned and balanced 550's after they sat around for too long... I think they basically froze up. Worth mentioning.
-------------------- The fastest car I own is a minivan....
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Apr 19 2006, 12:48 AM
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#42
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 Post Master Group: Members Posts: 626 Joined: 25-September 02 From: Urbana, IL Member No.: 19 |
Yeah, I've had cleaned injectors freeze up on me also if they sat for several months before they were installed.
-------------------- Eric Wort
87 White Buick Turbo 'T' (11.71 @ 116.5, 1.61 60ft, slipping trans) 92 Teal Eagle Talon TSi AWD (burn victim) |
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Apr 19 2006, 07:06 AM
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#43
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DSM Tech Wizard Group: Members Posts: 2,404 Joined: 16-December 03 From: Fletcher/Bloomington Member No.: 214 |
These are freshly cleaned and balanced disk style 780's (a used set I bought from Marcus). They've been wrapped in a paper towel inside a ziplock bag for about a month or so and haven't left my room since this week. Don't know if that helps at all or not.
Is there a way to "thaw" them out? -------------------- "I hear he tunes the space shuttle also...and that thing is fast"
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Apr 19 2006, 08:24 AM
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#44
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 Zen Master DSM Group: Moderators Posts: 3,008 Joined: 10-January 01 From: in front of you Member No.: 5 |
Sit on 'em for a while.
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Apr 19 2006, 08:26 AM
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#45
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DSM Tech Wizard Group: Members Posts: 2,404 Joined: 16-December 03 From: Fletcher/Bloomington Member No.: 214 |
Hardy Har Har Har!
-------------------- "I hear he tunes the space shuttle also...and that thing is fast"
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Apr 19 2006, 08:38 AM
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#46
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DSM Tech Wizard Group: Members Posts: 2,256 Joined: 10-January 01 From: central IL Member No.: 10 |
I think there's a way to clean them at home... might be worth a shot. Can't find the link at the moment...
-------------------- The fastest car I own is a minivan....
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Apr 19 2006, 09:43 AM
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#47
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DSM Tech Wizard Group: Members Posts: 2,404 Joined: 16-December 03 From: Fletcher/Bloomington Member No.: 214 |
They shouldn't need cleaning should they? They were just cleaned and balanced about a month ago.
-------------------- "I hear he tunes the space shuttle also...and that thing is fast"
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Apr 19 2006, 12:04 PM
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#48
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DSMCentral Godfather Group: Admin Posts: 3,823 Joined: 10-January 01 From: Washburn Member No.: 26 |
Are you positive there is fuel at the rail yet. Without burning yourself up, pull off the fuel return line or the feed line, direct it somewhere safe and crank the engine over to see if there is fuel getting to the rail. Then you will at least know what end of the system to look at.
-------------------- In Loving memory of David T Crebo
Greatness comes from the most unexpected places!  |
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Apr 19 2006, 12:24 PM
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#49
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DSM Tech Wizard Group: Members Posts: 2,404 Joined: 16-December 03 From: Fletcher/Bloomington Member No.: 214 |
The new fuel gauge is registering pressure at the regulator so I'm assuming there is fuel pressure. I suppose I could pull the line off and make sure though.
If it helps any I can hear the pump turn on while I'm cranking and I have checked the feed line several times and haven't found any leaks. The AFPR is adjusted all the way out and the gauge reads 27psi. -------------------- "I hear he tunes the space shuttle also...and that thing is fast"
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Apr 19 2006, 12:58 PM
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#50
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DSMCentral Godfather Group: Admin Posts: 3,823 Joined: 10-January 01 From: Washburn Member No.: 26 |
If you have fuel at the rail, then have someone use a test light at each injector plug to make sure the signal is getting to the injectors. Only after checking those two things would I mess with the injectors themselves.
-------------------- In Loving memory of David T Crebo
Greatness comes from the most unexpected places! |
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Apr 19 2006, 01:08 PM
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#51
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DSMCentral Godfather Group: Admin Posts: 3,823 Joined: 10-January 01 From: Washburn Member No.: 26 |
Those little test lights just sense voltage. You can pick them up cheap at just about any autoparts store and maybe walmart. It's just a little probe with a light that comes on when voltage is present.
-------------------- In Loving memory of David T Crebo
Greatness comes from the most unexpected places! |
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Apr 19 2006, 01:28 PM
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#52
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DSM Tech Wizard Group: Members Posts: 2,404 Joined: 16-December 03 From: Fletcher/Bloomington Member No.: 214 |
I've got a nice test light at home. I guess I never thought to check for signal at the injectors. DER! I'll do that tonight.
Mitsubishi here in town has an MPI relay in stock that I can have at well under Retail. I think I'm going to go pick it up this afternoon if anything just to have a spare. -------------------- "I hear he tunes the space shuttle also...and that thing is fast"
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Apr 19 2006, 06:25 PM
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#53
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DSM Tech Wizard Group: Members Posts: 2,404 Joined: 16-December 03 From: Fletcher/Bloomington Member No.: 214 |
Bought the new MPI relay, put it in, no dice.
After pulling one of the injector harnesses off while I had my assistant crank the engine, the darker wire gets power while the lighter colored one doesn't. It's not like a signal power either, it's on constantly but I suppose that doesn't matter. Looks like I've got trouble with the injectors!?!? -------------------- "I hear he tunes the space shuttle also...and that thing is fast"
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Apr 19 2006, 06:52 PM
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#54
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DSM Tech Wizard Group: Members Posts: 2,404 Joined: 16-December 03 From: Fletcher/Bloomington Member No.: 214 |
Problem is, I sold my originals to AWD POS DSM 1 awhile back. Otherwise I would homeboy.
-------------------- "I hear he tunes the space shuttle also...and that thing is fast"
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Apr 19 2006, 07:31 PM
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#55
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DSM Tech Wizard Group: Members Posts: 2,256 Joined: 10-January 01 From: central IL Member No.: 10 |
I've got a stock set also.
-------------------- The fastest car I own is a minivan....
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Apr 19 2006, 07:35 PM
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#56
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DSM Tech Wizard Group: Members Posts: 2,404 Joined: 16-December 03 From: Fletcher/Bloomington Member No.: 214 |
I'll have to take you up on that. You'll have a PM in about 5.23 seconds.
-------------------- "I hear he tunes the space shuttle also...and that thing is fast"
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Apr 19 2006, 08:52 PM
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#57
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DSMCentral Godfather Group: Admin Posts: 3,823 Joined: 10-January 01 From: Washburn Member No.: 26 |
QUOTE (turbohcar @ Apr 20 2006, 12:25 AM) After pulling one of the injector harnesses off while I had my assistant crank the engine, the darker wire gets power while the lighter colored one doesn't. It's not like a signal power either, it's on constantly but I suppose that doesn't matter. Looks like I've got trouble with the injectors!?!? Brett, The power should light the test light up in short and quick bursts just as if it were firing the injector when cranking the engine. Touch the probe on one side of the plug and ground to the other side while cranking to verify you are seeing pulses similar to that which will fire an injector. I'll be interested to see what the stock injectors do. -------------------- In Loving memory of David T Crebo
Greatness comes from the most unexpected places! |
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Apr 20 2006, 07:03 AM
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#58
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Zen Master DSM Group: Moderators Posts: 3,008 Joined: 10-January 01 From: in front of you Member No.: 5 |
Depending on how quickly the your test light drains its current, you may not be able to discern separate pulses. If you know anyone near you that has a multimeter that will measure frequency and/or duty cycle, you can use that to measure the number of pulses per second (frequency in Hz) or the injector duty cycle.
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Apr 20 2006, 07:55 AM
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#59
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DSM Tech Wizard Group: Members Posts: 2,404 Joined: 16-December 03 From: Fletcher/Bloomington Member No.: 214 |
Looks like I'll have to borrow a multimeter. I just tried doing the test that Marcus described and the light got dim as I cranked but I wasn't able to discern between pulses. The darker (brown wire) would be powered when the ignition is ON and get dim when I started cranking. The other lighter (yellow w/ stripe) wire has no power to it at all so I assumed it was the ground. I hooked the wires up accordingly, grounded the yellow, hooked the brown one up to the test light and got those results. The power wire also goes off when the ECU powers off.
Mind you all of this is with the brand new MPI relay. -------------------- "I hear he tunes the space shuttle also...and that thing is fast"
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Apr 20 2006, 10:00 AM
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#60
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 Eats and sleeps DSM jargin. Group: Members Posts: 1,995 Joined: 27-November 04 From: Yates City IL Member No.: 389 |
QUOTE (turbohcar @ Apr 19 2006, 12:24 PM) The AFPR is adjusted all the way out and the gauge reads 27psi. Is 27 psi enough pressure for the injectors to fire?? Isn't the pressure supposed to be 38-40 psi? It seems to me that if your still only getting 27 psi at the gauge something isn't right. The pump could be bad. Did you use rubber hose to connect the pump in the tank? They've been know to split, which would bleed off all your pressure. -------------------- 92 Eagle Talon TSI AWD "The Black Golfball" How fast can a 14B go???
91 Chevy C1500 "Problem Child" **SOLD** 01 Impala DD 07 Trailblazer Wife's new DD Cars run on blood, sweat, and horsepower... Without the first two, you can't get the last" SOB Racing "Sitting On Blocks" |
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