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If you have fuel and fire you should get something a pop cough sputter even with a busted cam. Hell these things will even run in the limp home mode with no ECM support.
My 2 cents says check the pats, spark, and ECM , I had a friend pull a flip chip with the vehicle power on and wipe the program. |
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I gotta ? What kinda car did the injectors come off of? Maybe they're too big?
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Agreed, but if the regulators operate off of vacuum, and there is no vacuum when it is cranking.....am I missing something?
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The FPR will still function without vacuum. Hell, that's how you're supposed to check fuel pressure, with the vacuum line off it.
You said the car floods when trying to star it with the fuel pump connected. Check the return lines. Maybe one of them is pinched. |
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I don't believe for 1 second that the car is flooding... efi cars don't flood...
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Ok, long shot. What type of fuel injectors? some one could have replaced the stock injectors with high impedance EV6's with pig tails. The ECM will slam them wide and fry.
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I don't believe for 1 second that the car is flooding... efi cars don't flood...
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there will be no vacuum at the regulator until the vehicle is running, default pressure is set by the regulator and the ECM changes this via vacuum from the engine.
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I bought a Black '98 LSC for a good price,
I purchased a warranted engine from a salvage yard out of a (supposedly) running '97 Mark VIII. |
It will almost try to sputter to life with WOT and run for three or four seconds but then it quickly dies as it floods. I took the plugs out to check compression again and they were all soaking wet. Compression was good by the way with all cylinders hovering around 150 or better. We've had a few knowledgeable guys come and take a look at it with fresh eyes and everyone just walks away dumbfounded. Any more ideas?|
OK this is going to be a wild ass out in left field guess...maybe it's pulling excess fuel or fuel vapor from the EVAP system (solenoid stuck open?). With this excess vapor plus the rich start up mixture, that may be the reason it's flooding. When you disable the fuel pump, then the mixture evens out enough for it to run until the engine is trying to run on vapors alone and then dies. The way to check this is to disconnect the hose on the intake that the EVAP is on. It's attatched to the black hard line..look where the a/c evap core connects to the accumulator. It's a hard line about 3/8". follow it until it changes to a regular rubber hose. Try pinching it off or plugging this hose and see if it will run. I know it's waaaaay out there, but I have seen stranger.
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Ok, we may be on to something. Just mentioned all this to my mechanic and he told me there was someone looking at it last week that noticed that the fan wasn't working. Perhaps we've got a bad part? I called the only yard around with a mark viii and they're gonna check to see if they have one. I'll post back with results. Hope we're going the right direction finally!
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VRCM also controls the fan so, yes I believe we're on the right track.
IF SO, you need to drive that car to houston and come take me to hooters! *LMAO* |
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left field comin at you. why did the previous motor pop a head gasket? could it be possible the converters are clogged?? the car should still run somewhat even with clogged converters, but it might be worth a check. the converters that are on it, did they come off the blown motor?
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I don't think it's throwing any codes though so that may not help much anyway
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man this one is a very tough cookie.
you should scan it and see what the PCM says.. it very well could be storing a code that may add more to the story. I was fairly certian it was gonna be a VCRM..then again, I was fairly certian of my ideas previous to the VCRM also. I wonder if somewhere, during the motor swap that a wire didn't get pulled. the power distribution block {big fuse box by the battery) would be a good place to start.. Check for power TO all those fuses and relays. ALSO the main power distribution block "beside the master cylinder" is also a place to look/check for broken wires.. THIS is where it gets very time consuming...sorry to say. I HATE troubleshooting electricity.. you cant SEE the damned stuff.. like you can a trans fluid leak.. lol |
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Wow what a PITA.
Lets go back to what phreakness said. Gas Air spark. First off are you sure the gas is worth a $hit? I had this same problem with a MG once and it had water in the gas. Whos know how long this car sat with this gas in the tank. You know you have spark. Next I would do a compression test on this junkyard motor. The Motor in the car ran, this one won't. So one of the connections got screwed up during the swap or this "new" motor is worse then the one you replaced. Good luck |
+1 For the LVC Community.
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Fantastic news! We got it to start up and run. Blacklsc1, you win the prize! Just for the sake of thoroughness, we loosened the exhaust after the manifolds and it started right up like nothing had ever happened. I'm at the shop right now and we're still determining where the blockage is, but at least now it runs. Wow! Can't thank you guys enough. I have learned so much! I will post back later with a full rundown of how it turned out.
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Thats great!
Chalk one up for Blacklsc1 I bet he is right...thats why the head gasket went on the first motor. Take Maxs advise and get that oil and filter changed. Then enjoy the car. Then DRIVE IT TO HOU$TON and Celebrate! |
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