Fuel Pump wont turn off/ Car wont start

[rovert]

Car started fine and ran ok before my new parts. I added an SR T25, DSM 450cc injectors, Z32 MAFS, Walbro fuel pump, FPR, and the appropriate Eprom tune for the new mods. My question is, what would keep my fuel pump from turning off after the five seconds? I searched and all I found was that it could be an improperly burned eprom. I have three diff ones I have tried, one from a buddy, one I burned myself, and one I bought from someone. They are all a little different and came from diff places. Could it be they are all bad? Or could it be that my ECU wasnt socketed correctly? If one of the sockets prongs was touching another could that cause my problem? Oh, and I forgot to say that the car wont run, at all. I tried testing for spark but it was too hard. I had sprayed some fuel in a cylinder and while cranking I swear it tried to catch atleast once.

Cliff Notes: Car wont start.New DSM injectors, MAFS and fuel pump.Fuel pump will prime but not turn off.Three diff eproms to try.

[rovert]

Ok I pulled the plugs and had my GF try to start it. It seems im not getting any spark. I never had a problem with it before so Im assuming it has to be the eprom somehow or the socket somehow?

[boost_boy]

Car started fine and ran ok before my new parts. I added an SR T25, DSM 450cc injectors, Z32 MAFS, Walbro fuel pump, FPR, and the appropriate Eprom tune for the new mods. My question is, what would keep my fuel pump from turning off after the five seconds? I searched and all I found was that it could be an improperly burned eprom. I have three diff ones I have tried, one from a buddy, one I burned myself, and one I bought from someone. They are all a little different and came from diff places. Could it be they are all bad? Or could it be that my ECU wasnt socketed correctly? If one of the sockets prongs was touching another could that cause my problem? Oh, and I forgot to say that the car wont run, at all. I tried testing for spark but it was too hard. I had sprayed some fuel in a cylinder and while cranking I swear it tried to catch atleast once.

Cliff Notes: Car wont start.New DSM injectors, MAFS and fuel pump.Fuel pump will prime but not turn off.Three diff eproms to try.

Fuel pump won't turn off because your computer is keeping it on. Start at the computer and will more than likely fix all you other problems as well.

Dee

[rovert]

Well I resocketed my ecu today hoping I was shorting it out somewhere with the old one. This one is a lot cleaner and I took my time to make sure I did it right. Im still having the same issues. No spark, and the fuel pump stays on. I just dont understand how the ECU works with the fuel pump relay and eprom and stuff. Could a bad eprom/eprom setup be causing my problems? -Trevor

[boost_boy]

Well I resocketed my ecu today hoping I was shorting it out somewhere with the old one. This one is a lot cleaner and I took my time to make sure I did it right. Im still having the same issues. No spark, and the fuel pump stays on. I just dont understand how the ECU works with the fuel pump relay and eprom and stuff. Could a bad eprom/eprom setup be causing my problems? -Trevor

It could be something wrong witht he injector driver on the ECU. I had this happen to me before and sadly enough, it was my own fault. Accidentally grounded-out one of my naked injector wires while the car was idling and thus the car would run fine, but when I cut the ignition, the ecu would keep the whole circuit open.In order for me to kill the car, I had to unplug one of the plugs on the ecu to cut the car everytime.

Dee

[float_6969]

It also sounds to me like you've got an ECU problem. Are you sure you didn't damage the ECU soldiering in the socket? Did you remember to tighten down the bolt that plugs the loom into the ecu? It doesn't need to be super tight, but snug.

[rovert]

It also sounds to me like you'e got an ECU problem. Are you sure you didn't damage the ECU soldiering in the socket? Did you remember to tighten down the bolt that plugs the loom into the ecu? It doesn't need to be super tight, but snug.

Ya, im sure the plug was tight, I have made that mistake before. And Im starting to think I did hurt the ECU somehow but I just donw know where. All of the little wires that come from the eprom socket all have continuity. I guess if I knew how the ECU/Eprom worked I could figure it out. Its just wierd that im getting no spark. The fuel pump I can deal with, even though I know its not right. Thanks for helping me try to figure this out!

[rovert]

ttt, bought a #98 ECU and will try that as soon as it gets in. Any ideas on where else I could be looking until it gets here?

[boost_boy]

ttt, bought a #98 ECU and will try that as soon as it gets in. Any ideas on where else I could be looking until it gets here?

JUst be patient and wait for that ecu. You're going to kill your brain cells trying to figure that out. But I've all so seen horrible wiring jobs that causes ecus to fail. Take your time man and double check your wiring and triple check it too many times to make sure you're covered on the wiring side of things.

Dee

[rovert]

Got a used ECU in today and plugged it in. My fuel pump shut off after five seconds and the car fired right up. I dont know what happened with my old one but it was obviously broken somehow. Now I just need to get my tuned eprom soldered in and I should be ready to go.

[rovert]

Ok ****, soldered up my tuned eprom into the new ECU and im having THE SAME PROBLEM! What the hell is going on?

[boost_boy]

Ok ****, soldered up my tuned eprom into the new ECU and im having THE SAME PROBLEM! What the hell is going on?

Stop playing with that eprom thing as something is definitely being done wrong or something is wrong with something.

Dee

[rovert]

Bump, any ideas guys? Is the fuel pump/ spark plug problem directly related to the eprom or did I short something out while soldering in the socket? Its the same problem with both ECU's. 100% stock ecu works fine minus the fact its not tuned for my upgrades.

[Buddyworm]

My money's on the chip. An improper or incomplete burn caused a similar issue with the fuel pump the first few times I tried burning eproms. If everything is gravy the green and red lights on the ECU should light up and remain constant. If, assuming the rest of the ECU is in good working order, they're flickering or blinking erratically something's buggered with the chip.

Try taking the stock eprom and use it in one of your socketted ECUs. If it works that's a pretty good indication a) you didn't eff anything up soldering, and b) it's the tuned chip that's your problem.

[progman]

Same exact thing happened to me when I burnt an eprom wrong. If the chip i s broken or the computer can't read it that's what will happen.

[rovert]

Same exact thing happened to me when I burnt an eprom wrong. If the chip i s broken or the computer can't read it that's what will happen.

Thats good to know, only problem is both the stock emproms broke some pins while I was desoldering them. I have gone over both ECUs mulitple times looking for cracks or burns or broken leads but they both look ok. I just wish I could get a stock eprom somehow.

[rovert]

Update. Got ANOTHER stock ECU, had a TV guy pull the stock eprom and socket the ECU, got home, stuck the stock eprom in the socket and still no success. So, I go to Ebay and buy a ECU that has already been socketed with some eprom tuned for a stock motor. I pull the eprom from the ECU and put in the stock eprom from another ECU of the same type.....no luck. I try a 27128 Eprom that I burned myself in the new ECu (socketed by someone else) and still, you guessed it, no luck. Im runnig out of options and Im starting to deplete the North American supply of stock CA ECUs. What the hell is going on, I would do anything to get my car running at this point.....but things like AEM EMS/ MegaSquirt are out of my budget. Every stock ecu I have tried in my car will work, it just doesnt have the proper tune on it for my mods. Every socketed ECU I try with stock/burned eproms causes my car to not start/ fuel pump to stay on/ fuel pump relays to click/ ECU lights to flash. Has anybody else had this problem? Should buy one more stock ECU and send it to someone else and have them socket/tune it? Does anybody on here have for sale a socketed ecu with a tune for my mods? I would pay good for it....

[ca18detgabby]

as much as I dis like them........ why not run a SAFC to correct till you can get a decent tuned one to work. maybe take it to a dyno and have them do it right in front of you.

do you test all the ECUs prior to sending them out?

Yes I did have this same issue btw, still no solution

[rovert]

Yes, every stock ECU worked fine (except for the fact it blew a lot of un-burned gas ou the exhaust because of the 450cc injectors) and was always in limp mode because of the Z32 MAFS. I have thougt of getting an SAFC but would much rather have a proper tune being im running bigger injectors. Only thing I can think of is maybe the socketed ECU I just bought works but I just dont have a good chip to put in it.

[progman]

If you want to wait I can burn you a chip for that MAF and the 450cc. But I have to check to see if I have another blank chip or not. It seems like all your chips are somehow bad. .. oh yeah. I have a stock chip I can send you if you want to use it to test the ECU's.

Let me know.

[Buddyworm]

Are you inserting the chips in the proper direction? Because there's no other reason that a properly socketted ecu should not work with a good chip.

[float_6969]

Wait, what chip are you using? Depending on it's size, you may have to burn the image to the chip multiple times to fill it up. Does that make sense?

[rovert]

Wait, what chip are you using? Depending on it's size, you may have to burn the image to the chip multiple times to fill it up. Does that make sense?

Ya, I had been trying 27C256's without filling them up and just recently tried 27128's and havent had any luck with them either. What Im hoping is, this new, socketed ECU I bought is fine and I dont have any good chips to try with it. Yes, I have been putting them in the right way, and I know that you need to fill up any chips that are bigger than 128K. I was able to get the stock chip from one of the ECU's but thats doesnt work either, Im hoping it was just damaged somehow while it was being desoldered. I ordered a tune from Jason at Emance that he will burn and send to me, hopefully that will work.

[greensx]

Good luck with that chip man Jason screwed me with the same set up that you have and never wanted to do anything about it. Instead he sent me a chip to work with the stock maf. Here's the private message from zilvia

Originally Posted by nosajtonQuote:Originally Posted by satal95Well man just to let you know that it was your tuning. I bought a stock maf sensor for the ca18det and it runs with the stock maf plugged in. So it wasn't my ecu and it wasn't the wiring. Because if it was either or the stock maf wouldn't have worked on it either. Unless you have another reason for the z maf not working. Just remember they are working maf's because i tried them on other people's cars and they worked fine.

so the stock maf works on my ecu?(Jason's response)

So are you going to give me an answer or did i just waste money on a tune that never happened (was getting aggravated because he wasn't answering my pm's on zilvia or his email) Steve, i am sending you a retune, i want you to try it and tell me how it runs.

it is for the 450cc injectors with stock maf since you are runnign only 12psi this should work great. it's been mapped properly. the problem i found was with the z32 maf and the ca ecu's some read it properly and some dont so try this and tell me how you like it

Jason(messages end)

I wish i knew how to copy the actual page but hopefully this is good enough to show that he doesn't know what he's doing with the ca ecu. Good luck either way man

[float_6969]

I cant' vouch for him regarding the CA, but the chip he sent me for a KAT setup worked awesome.

What program are you using to modify the bin?

[rovert]

All is well! It turns out the ECU I bought pre-soldered is a good one and all along this has been an issue with the eproms. I stock one I pulled is no good, it reads 28 across the board on the high octane map. I guess it got damaged by getting too hot while it was beiing pulled. I burned the base CA bin file to a 27128 eprom and it works!, not well, but it works none the less. SO, that being said, we will have to wait and see how well Jasons tune is. All I can say about the guy is he sounds like he knows what he is talking about. There are too many fly-by-night "tuners" out there that have no idea what they are doing. Just from out emails I have a lot of confidence in the guy, and I will have a final answer when his eprom arrives. He said they are currently working on their drag car so he is pressed for time, but I hope he can hurry and get me my tune so I can effin drive already! Thanks for the help guys, as I said before, all this drama was because of bad eproms.