IHADAV8.com - Turbo Buick Tech, and Nonsense
Tech Area => General Buick Tech => Topic started by: Scoobum on July 15 2016, 11:09:43 PM
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My car ran great tonite...excep t in high gear. It's acting like the engine is cutting out. Pulls like a freight train in 1st and 2nd...but falls on its face in high gear. SM numbers are normal...and the PL file looks fine. Fuel pressure is rising with boost...very slight KR...less than 1 count in high gear...prolly from sputtering. Partial throttle in high gear is fine...but falls on its face at WOT...in high gear. I'm thinking the ignition is breaking down under full load in high gear. I have a couple spare coil packs and ignition modules. Once again...open to suggestions.
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Good voltage on the log?
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Larry...good question. Laptop is in the car. I'll post it in the morning. I remember the SM at idle was in the 13's. I think it's normally 15.2 at WOT with the Caspers volt booster...but let me check in the morning.
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More PL data. Engine is cutting out at 4550 RPM's. Voltage at WOT is 15.6
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as it's the easiest thing I can think of, swap the module/coil :)
If that is a no go...then measure the crank thrust
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Steve...off the top of your head...do you know the ohm value for the coils. I'll check the ones on the car...and the spares I have.
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11-13,000 is the typical ohmage
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Thanks. :)
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Bear with me guys...cuz I can barely put batteries in a flashlite. I put the ohm meter on 20K...and this is what I got from the coil pack from last nite that's on the car.
11.58
11.53
11.61
I have 2 spare coil packs.
1st
12.53
12.58
12.58
2nd
11.53
11.52
11.53
I have 2 spare ignition modules...one with a part number...and one without. I'll post pics...maybe you guys can figure out what brand they are...and if they'll work with an external tach.
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coils look okay. Does not say anything about the modules.
Tach should work fine with the modules...but they may, or may not, be anygood
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Pics of the modules.
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I swapped in one of the extra modules I have. We'll try it again on the 29th.
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pretty sure that delco one is for a regular 3.8-not a turbo
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Great...that was the one I swapped in. I just can't win. :cheers:
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Steve...the one I removed from the car looks like a Delco unit...and we have a different part number...so you're likely right.
24503624
6136
The million dollar question. What's the difference...a nd will the one I installed work with our engines? If not...then I'll swap in the other spare I have.
The car fired right up with the one I installed.
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624 is the original delco number and the only module that will work with caspers coil/module tester. the other one, when I google it, comes up for 3.8 and not the turbo...did not find it on rock auto. The original was made by Magnavox
Seems to be for a 92 olds 3.8 I bet it will not work under boost
the Standard brand LX338 reportedly works for some. None of the other brands seem to work. Delco #19260720 is the GM replacement for 624. It will not work on the casper coil tester so it is made differently... probably by Standard or someone but I have heard of it working
Doesn't Dan or someone have a known working module and coil so you can find out if that is the problem.
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Once again Steve...parts are scarce up here. Modules up here...cost an arm and a leg brand new. Is there an aftermarket brand that you know for sure works that I can get through a jobber. If so...which one(s).
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The Standard LX338 has worked for quite a few people....
Still, I would try to prove that was the problem before I bought anything
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I believe the AC Delco D1996 will work, but they aren't much less expensive
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That is the one mentioned above
. 720 last three numbers
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yes but in a delco number
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If I have to shell out for a new module...then I'll walk into the dealer and order one. Lets talk about this fuel pump. When Dan and I went to fire this engine up...it took a little while for the pump to come up to line off pressure. I don't recall having to wait after an engine change before. Something else. The pump isn't holding pressure after key off. I noticed that yesterday. I don't have the FP hooked to PL. I always take a practice run down the track and watch the FP gauge to verify the fuel pressure is rising 1 for 1. When I eased into it Friday night, I let it go into high gear...but not WOT...and called it good...as the fuel pressure was following boost. I'm wondwering if it's starving for fuel at WOT. I can get a FP from Jack at Racetronix in a day or two. Everyones thots on this.
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Trust but verify....Rona ld Reagan had a buick. Check it. Sounds fishy
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What are the O2's doing
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Jim, I just checked the file. The instant it bogged...the 02's dropped horribly...all the way to zero for a split second. TPS shows me outta the throttle instantly. KR was less than 1 count. Boost is just shy of 16. I just barely pulled the rod over the arm for the test runs. Any ideas guys?
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I read something about if you clamp the hose on the fp too tight or with 2 fuel inj clamps that can cause the "hold pressure" issue after shut off. Mine doesn't hold either, but never been an issue.
Check ball is in the snout I think.
Maybe the pump is taking a dump. And only showing up on extreme demand.
I'd verify like Steve said 1:1 in high gear.
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I'm gonna order a pump from Jack. I broke my own rule. I always install a new pump every spring.
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Anyone had any luck with the Standard LX338-T
It's readily available up here.
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They are hit and miss Brad, will your supplier take it back if you have a problem its obvious if they are not right.
I tried 2 and the 3rd one was good.
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Trying the fuel pump first. I have 3 modules here I can try after I pop a fuel pump in it.
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Is the T the economy version? The regular LX338 has worked in most cases I have seen
Some one sent me one once to see if I thought it was bad since they had misfire problems. Of course, it would not work on the Caspers tester, but, it handled 27 psi of boost just fine on my GN
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Steve, I have no idea. What we have up here, may vary from the lower 48...but I'll inquire tomorrow. The AC Delco from NOS4GN is half the price...compar ed to what I have to pay up here. Let's see what happens with a pump change. I'm gonna swap back in the same module from Friday nite.
I assumed the T was for the turbo cars?
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I asked Rock auto once about the diffence on standard brand injectors. the T has less warranty period than the number without a T.
Strangely, the T module is shown in the economy group of parts but it costs a couple of bucks more than the the premium category that has no T
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Thanks Steve, I'll look into it. Pump should be here in a couple days. Racetronix is in Toronto.
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Pump arrived today...and installing it Sunday. Weather permitting...w e'll hit the track next Friday and try and get this sorted out.
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:cheers:
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Once again Steve...parts are scarce up here. Modules up here...cost an arm and a leg brand new. Is there an aftermarket brand that you know for sure works that I can get through a jobber. If so...which one(s).
Arm and a leg? Where did you get that deal? It cost two arms and 2 legs here. :(
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Scoobum, if you're still in need of a module I have some spare NOS AC Delco 24503624. Couple of them still in the original box. These are the good ones made by Magnavox not the crap shoot they sell these days. I even have an aftermarket one for cheaper. Tested on my car guarantee no drama.
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Scoobum, if you're still in need of a module I have some spare NOS AC Delco 24503624. Couple of them still in the original box. These are the good ones made by Magnavox not the crap shoot they sell these days. I even have an aftermarket one for cheaper. Tested on my car guarantee no drama.
Thanks so much. PM me your phone number and an appropriate time to call.
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....
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Scoobum, if you're still in need of a module I have some spare NOS AC Delco 24503624. Couple of them still in the original box. These are the good ones made by Magnavox not the crap shoot they sell these days. I even have an aftermarket one for cheaper. Tested on my car guarantee no drama.
Thanks so much. PM me your phone number and an appropriate time to call.
I see you are in Canada so that would make us 6 hours apart. I'm still at work and have to work tomorrow as well but if you are able to call me 1pm tomorrow (your time) I should be able to take your call.
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Scott, I'm working tomorrow. Let me know what time would be good on Sunday. I'm in Ontario Canada...we're on EST here.
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Scott, I'm working tomorrow. Let me know what time would be good on Sunday. I'm in Ontario Canada...we're on EST here.
Edited my post and sent you a PM with my info. Didn't realize I was posting my number for all to see...Thought I was in private messaging...
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Damn, right when I was about to prank call a canadian like they do on youtube. :013:
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Damn, right when I was about to prank call a canadian like they do on youtube. :013:
lol
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Scott, I'll give you a call around 4pm. Stay safe.
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Quietest fuel pump I've ever heard...don't like it. The other sounded like a pump from a 747. The FP was 4 lbs higher with the new pump. I had to dial it down. I swapped in a new fuel filter as well.
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Scott, I'll give you a call around 4pm. Stay safe.
Nice talking to you today. When you're ready let me know and I'll get a module shipped out to you. I just sent a fuel pump to someone in Edmonton, Alberta. First class mail was $15 or so (no insurance or tracking) but it takes a really long time to get there... I will think twice before complaining about shipping costs to Hawaii again. Canadians have us beat!
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Oahu...ya' got it made! Let's see what happens with the pump this Friday.
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Back to the track tomorrow to try the new fuel pump. Going back to the same ignition module. I have 2 others to try...but Steve thinks they're for an NA engine. Gonna try them anyway if the pump isn't the solution. God hates a coward.
Don with the stock TR that ran the low 13 texted me today and asked if the track was open tomorrow. Wondering if he wants to try his ET Streets...
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Wishing you some better luck this weekend! Let us know how it goes
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You don't test before you get to the track?
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Jeremy...you can't. If you get caught doing anything over 30 mph it's 'racing'. 5 grand fine...car impounded...li cence suspended...in surance is so high you can no longer afford to drive.
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:O - I've been pulled over testing with the T-type and the cop just wanted to know what the whistle was :rock:
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1st pass-Left from an idle and waited till it went into 3rd gear...then flat footed it. Revved clean in 3rd gear.
2nd pass-Left from an idle and waited till it went into 2nd gear...then flat footed it through 2nd and 3rd. Revved clean in 2nd and 3rd.
3rd pass-Brought the revs up to 1500 and jumped on it. Made a clean pass through the 1/8th mile. On 17 PSI with Erics chip on the default settings it went 8.40 at 84 through the 1/8th...and coasted from the 1/8th to a 13.8 at 76. High and low gear 02's were in the 850's. I used the other Delco module...seems to work fine.
Thanks for everyones help...always appreciative.
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glad it looks like it is working...put some more pressure in the cylinders and see if it keeps it up :)
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Gonna bump it to 22 and dial in the low gear tune. :rock:
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Damn those new Mustangs are slow. On my 3rd pass a new Mustang got up beside me. I let it out of it at the 1/8th and coasted to a 13.8. He was still 4 to 6 lengths behind. If I were him I'd be going to the dealer in the morning and asking for my money back.
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LOL...I bet he was pissed!
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Thanks for everyones help...always appreciative.
No problem! I'm always willin' to help.
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1st pass-Left from an idle and waited till it went into 3rd gear...then flat footed it. Revved clean in 3rd gear.
2nd pass-Left from an idle and waited till it went into 2nd gear...then flat footed it through 2nd and 3rd. Revved clean in 2nd and 3rd.
3rd pass-Brought the revs up to 1500 and jumped on it. Made a clean pass through the 1/8th mile. On 17 PSI with Erics chip on the default settings it went 8.40 at 84 through the 1/8th...and coasted from the 1/8th to a 13.8 at 76. High and low gear 02's were in the 850's. I used the other Delco module...seems to work fine.
Thanks for everyones help...always appreciative.
:cheers: