HELP! Hydrolocked engine question

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fe3xclone
Helpful Squirter
Posts: 35
Joined: Sat Jun 07, 2008 7:12 pm

HELP! Hydrolocked engine question

Post by fe3xclone »

I'm starting to really get fed up with this. :( I don't know why it happened but I just hydrolocked my engine with fuel. The other night I had it up and running again and finally felt like I was moving forward with my tuning of the idle. Today I had some free time and decided to give it another go.

First off, before I changed anything, I tried to fire it up again like I had left it. Sputtered a few times but would never catch. Been the story of my life with this thing.
So I started messing around with the cranking pulse widths trying to see if something different helped. Nothing.

Did a couple of cranks in flood clear mode and would get the engine to sputter a few times but wouldn't fire. The only time it acted like it wanted to take off is if I held the accelerator down about 50% or so.

I've been using a few parameters from another persons tune and noticed they had their PWM% set at 75. I changed that to 100 for mine since I have high impedance injectors. Could this have been the problem? At least I thought I had high impedance injectors. :(

I'm really starting to consider swapping on a carb just to at least have a consistant running vehicle. I'm about to pull my hair out with this thing.

Anyone in the Dayton, OH area make house calls? :D

Thanks,
Andrew Geeting
1987 Oldsmobile Cutlass Supreme
455/T-56/4.30 w/ MS EFI
MS-II in a MS-1 version 2.2 board - 2.891 code
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stevemgb
MegaSquirt Newbie
Posts: 11
Joined: Tue Dec 23, 2008 9:22 am

Re: HELP! Hydrolocked engine question

Post by stevemgb »

Holding the throttle down lets in lots more air weakening the mixture suggesting you are possibly too rich.I had this problem when first squirting my car as I thought I knew what I was doing but didnt.I turned off the priming pulse as I found that you could put lots and lots of fuel in the motor every time you turn on the key.Reduce the cranking pulse widths and try again,if it does not attempt to fire add fuel in small amounts/open the throttle(if this improves it reduce the fuel).It took me several days of starts to get close to the right amounts but now it is ok.Good luck.Steve.
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dodd1980
MegaSquirt Newbie
Posts: 15
Joined: Tue Jul 24, 2007 12:16 am

Re: HELP! Hydrolocked engine question

Post by dodd1980 »

i had this happen once it turned out megasquirt got stuck in injector test mode somehow
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