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Search: Posts Made By: RBob
Showing results 1 to 50 of 496
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Forum: DFI and ECM
04-20-2024, 04:07 PM
Replies: 17
Views: 474
Posted By RBob

Re: Ideas for getting an engine tuned on the dyno.

Moved, not DIY.

RBob.
Forum: DFI and ECM
04-18-2024, 06:24 PM
Replies: 17
Views: 474
Posted By RBob

Re: Ideas for getting an engine tuned on the dyno.

Where is a base tune file coming from? And why multiple trips to the dyno? Since the engine is going on the dyno for a checkout, why not have WOT tuned then?

On a street driven car more tuning...
Forum: DIY PROM
04-15-2024, 06:30 AM
Replies: 3
Views: 145
Posted By RBob

Re: EBL P4 confirming hiway mode engagement while driving

The LeanCr indicator is the tell-tale. The cAFR should also be going high(er).

RBob.
Forum: Electronics
04-12-2024, 01:30 AM
Replies: 3
Views: 84
Posted By RBob

Re: 91 Formula high beams stuck on

I've had issues with the under-dash hush panel interfering with the dimmer switch rod. Locks it up you can't operate the high/low beam switch assembly.

Try this: along the rear most edge of the...
Forum: DFI and ECM
04-11-2024, 03:51 PM
Replies: 13
Views: 225
Posted By RBob

Re: Possible bad ECM?

Not sure why you even bother with an unreliable '7730 ECM just for a VSS buffer. Find yourself a stock 4_Out_Buffer box or even use a Dakota Digital buffer box. Be done with that ECM and go simple...
Forum: V6
04-01-2024, 01:12 PM
Replies: 3
Views: 131
Posted By RBob

Re: Belt routing for 3.1 without air pump?

As long as the back of the drive belt is against the water pump pulley, it is turning the same direction. Which is true for both belt routing you show...

RBob.
Forum: Electronics
03-29-2024, 06:31 AM
Replies: 15
Views: 2,434
Posted By RBob

Re: 92 RS Vehicle Speed Sensor

There isn't a spec for the voltage from the VSS. It does vary from 0 volts up to 100V.

What the ECM/4-out-buffer is looking at is the frequency of the signal. That is what defines the speed of the...
Forum: Electronics
03-21-2024, 04:29 PM
Replies: 14
Views: 297
Posted By RBob

Re: Pickup coil will not come out

I can't recall where I read this, but my understanding is that it is an oil reservoir to lube the upper bearing/bushing. A thick/heavy foam ring is installed and then saturated with oil. Even the...
Forum: DIY PROM
03-20-2024, 04:35 PM
Replies: 8
Views: 272
Posted By RBob

Re: CobraRTP MotronicRT R6?

It doesn't support the 2732 EPROM size.

RBob.
Forum: DIY PROM
03-20-2024, 12:48 PM
Replies: 8
Views: 272
Posted By RBob

Re: CobraRTP MotronicRT R6?

Won't work in the '8746 ECM...

RBob.
Forum: Electronics
03-13-2024, 08:22 PM
Replies: 5
Views: 221
Posted By RBob

Re: Need help identifying wire (relay in the engine compartment)

Fuel pump test connector, in which the 'connector' has been cut off. Was a fast-on type.

At key-off run +12 volts to that wire/connector to power up the fuel pump while bypassing the main relay...
Forum: Transmissions and Drivetrain
03-05-2024, 03:23 PM
Replies: 21
Views: 623
Posted By RBob

Re: Trans cooler line fitting O-ring?

It has been a bit since I've been down this road. IIRC, the brass fitting that threads into the trans case is sealed via a tapered areas of the fitting to case.

IOW, the stock brass fitting is...
Forum: DFI and ECM
03-04-2024, 03:22 PM
Replies: 9
Views: 291
Posted By RBob

Re: Turn fans off at highway speeds Dominator ecu

Some don't, some do, depends upon the ECM and the implementation.

RBob.
Forum: Electronics
03-02-2024, 04:15 PM
Replies: 41
Views: 1,106
Posted By RBob

Re: Battery Experience / Advice

Get something other then an Interstate. Not sure what is going on with them, but look at the warranty period. Decades ago and not so decades ago Interstate was all I would use. Came with 6 - 7 year...
Forum: V6
02-28-2024, 07:50 PM
Replies: 10
Views: 247
Posted By RBob

Re: V6 3.1 Throttle Position Sensor Gasket

What is the orange 'stuff' leaking out from behind the TPS?

I guess this isn't really a Firebird 3.1l engine?

RBob.
Forum: V6
02-27-2024, 09:58 AM
Replies: 10
Views: 247
Posted By RBob

Re: V6 3.1 Throttle Position Sensor Gasket

There isn't a gasket for the TPS, it mounts over the end of the throttle shaft. A dry area.

RBob.
Forum: DIY PROM
02-20-2024, 01:15 PM
Replies: 32
Views: 774
Posted By RBob

Re: Tuner Pro or Holley Efi Terminator X

I can't say whether the Holley will be easier or not. But, I would go with it before using the stock GM ECM. For multiple reasons, some of which you touched on. Getting rid of the non-replaceable and...
Forum: DIY PROM
02-18-2024, 12:48 PM
Replies: 32
Views: 789
Posted By RBob

Re: Chasing BLMs

When the prop gains are disabled, it forces the ECM to creates x-counts via the INT. Same if there isn't enough prop gain. One way or another, the ECM needs to see x-counts (in closed loop of...
Forum: TBI
02-17-2024, 06:36 AM
Replies: 32
Views: 1,482
Posted By RBob

Re: EBL Flash Rich Idle

Note that the FPR on a return-type MPFI system MUST be vacuum referenced. This is not the same as a VRFPR on a TBI setup. In this case, MPFI, vacuum referencing the FPR maintains the same...
Forum: Tech / General Engine
02-06-2024, 12:29 PM
Replies: 3
Views: 317
Posted By RBob

Re: Gas Tank Unfillable

Anther item to check, is to see if the filler neck has been cut. Then patched with a piece of hose. Many of these tanks have a channel to allow air out of the tank, while fuel pours in. This is done...
Forum: DIY PROM
01-31-2024, 03:47 PM
Replies: 4
Views: 173
Posted By RBob

Re: TPS initialization voltage question

Unwritten rule, need the PROM location of the parameters. The names aren't always easy to match up with an XDF and hac.

As for the above, it is the auto-zero parameters for the TPS. The '90 - '92...
Forum: Electronics
01-16-2024, 06:47 AM
Replies: 4
Views: 219
Posted By RBob

Re: ecm control?

Fuel injection, spark timing (distributor), emissions equipment (AIR, EGR, CCP, closed loop), fuel pump, and the TCC lockup.

RBob.
Forum: Electronics
01-14-2024, 09:33 PM
Replies: 1
Views: 179
Posted By RBob

Re: Brake Light Switch Help

In the pic, it is the left switch:

https://www.thirdgen.org/forums/electronics/692033-high-mount-brake-light.html#post6514414

RBob.
Forum: DFI and ECM
12-28-2023, 03:16 PM
Replies: 1
Views: 282
Posted By RBob

Re: trying to read OBD I with the cable

The ALDL on the CCC engines is goofy. The noise you are hearing is likely the MCS being exercised.Even with a running engine the idle speed is changed, timing is added to force detonation and so many...
Forum: Tech / General Engine
12-26-2023, 02:50 PM
Replies: 9
Views: 524
Posted By RBob

Re: Hose diagram and sensors

A VIN E engine is TBI (8th digit of VIN). Somebody swapped out the EFI engine with a carb'd engine. The 4-pin square connector up top passenger side is for the IAC. Which no longer exists. You do...
Forum: DFI and ECM
12-18-2023, 01:52 PM
Replies: 9
Views: 359
Posted By RBob

Re: 88 IROC TPI 350 no power to ECM

On top of the under-hood inline fuse that Tuned-Performance mentions. There is an ECM fuse in the fuse block that provides key-on power to ECM pin A6. That input is what tells the ECM to power up and...
Forum: DIY PROM
12-18-2023, 01:43 PM
Replies: 8
Views: 350
Posted By RBob

Re: Fuel injector tuning

Here on TGO, a lot longer then that.

RBob.
Forum: Transmissions and Drivetrain
12-17-2023, 09:50 PM
Replies: 33
Views: 915
Posted By RBob

Re: TCC lock up & unlock & repeat

You need a vacuum switch with more hysteresis. Don't know if one is available or not. The reason for the lock/unlock, rinse and repeat is that when the TCC unlocks (low vacuum), the engine RPM goes...
Forum: DIY PROM
12-14-2023, 05:16 PM
Replies: 12
Views: 351
Posted By RBob

Re: Throttle Diminishing Returns

It is usually worthwhile using a timing light and checking that the actual SA matches the commanded. Been down that road.

RBob.
Forum: DIY PROM
12-13-2023, 12:03 AM
Replies: 12
Views: 351
Posted By RBob

Re: Throttle Diminishing Returns

Spark advance...

RBob.
Forum: Transmissions and Drivetrain
12-06-2023, 08:30 AM
Replies: 19
Views: 737
Posted By RBob

Re: Parallelism of Bellhousing

Can take it to a real machine shop and have it trued up. Clamp the block side to the mill table and take a skim cut off the transmission mounting side. Ended up being as parallel as could be.

RBob.
Forum: Transmissions and Drivetrain
12-02-2023, 03:48 PM
Replies: 2
Views: 243
Posted By RBob

Re: 0 Pressure

Double check that there is fluid in the pan. I know, obvious, but one never knows.

RBob.
Forum: TBI
11-18-2023, 05:28 PM
Replies: 23
Views: 621
Posted By RBob

Re: New VRFPR, Crazy VE Table

To be honest, I don't know how much 'give' or damping is required. I ran into this accidentally, only to have my findings backed up a day later by another tuner.

Many port injected vehicles run...
Forum: TBI
11-15-2023, 09:31 PM
Replies: 23
Views: 621
Posted By RBob

Re: New VRFPR, Crazy VE Table

OK, need to add about 4 feet of rubber hose. Either between the feed line and the TBI (best) or the TBI outlet and FPR. Can use regular fuel line, no need for the expensive stuff. Can also coil it so...
Forum: TBI
11-15-2023, 03:38 PM
Replies: 23
Views: 621
Posted By RBob

Re: New VRFPR, Crazy VE Table

Ace17, any chance the fuel system is hard plumbed? That is from the feed into the TBI and the outlet to the VRFPR ?

There is something else that I've run into. There is an easy test for it.
...
Forum: TBI
11-14-2023, 02:45 PM
Replies: 23
Views: 621
Posted By RBob

Re: New VRFPR, Crazy VE Table

Did you change the BPC - BPC vs VAC table to match? Have you checked the actual fuel pressure at various manifold pressure points? Is the VRFPR vacuum line connected to a full time port?

RBob.
Forum: TBI
11-14-2023, 02:42 PM
Replies: 2
Views: 270
Posted By RBob

Re: TBI floods

I'd recommend new spark plugs, toss the current ones.

Is this fresh gas? Or left over from the Summer? If left over it is easily a gas problem. Summer gas doesn't want to burn in the cold winter...
Forum: DIY PROM
11-06-2023, 10:55 PM
Replies: 1
Views: 339
Posted By RBob

Re: Really Stupid EBL Question

http://dynamicefi.com/EBL_Flash_Install.php

RBob.
Forum: Transmissions and Drivetrain
11-06-2023, 01:21 PM
Replies: 9
Views: 6,250
Posted By RBob

Re: Transmission shifter stuck in Park

Heads up, there is no brake pedal interlock with pulling the auto shifter out of park, or cranking over the engine. Barking up the wrong tree here.

There is a P/N safety switch on the shifter...
Forum: Electronics
11-06-2023, 01:00 PM
Replies: 5
Views: 307
Posted By RBob

Re: Amazon/eBay pressure transducers vs Quality transducers

Honeywell, PX3 and MLH series sensors....

RBob.
Forum: DIY PROM
11-03-2023, 01:29 PM
Replies: 5,154
Views: 633,548
Posted By RBob

Re: Tuning with the EBL

Start->All Programs->EBL Flash->Calibration Help

Engine Coolant and Intake Air Temperature Filter

Entry: CTS - Filter

Filter coefficient used to smooth the coolant value.

RBob.
Forum: Brakes
11-02-2023, 03:46 PM
Replies: 9
Views: 668
Posted By RBob

Re: Corvette calipers, LS1 Camaros rotors/ pads compatibility

Bend the anti-rattle clips to put more pressure on the pads/caliper. BTDT, drove me daffy until I did that.

The issue is that the pads are rattling in the abutments. Need more tension on the...
Forum: DFI and ECM
11-02-2023, 02:03 PM
Replies: 3
Views: 298
Posted By RBob

Re: Cranks but does not start

This is a distributor issue. No tach on dash or ALDL means that the distributor isn't working to create DRPs.

It could be as simple as the 2-wire pigtail between the coil and distributor is bad....
Forum: DIY PROM
11-02-2023, 01:57 PM
Replies: 5,154
Views: 633,548
Posted By RBob

Re: Tuning with the EBL

Start->All Programs->EBL Flash->List of BINs

EBL_F_3005.BIN: 5.7l TPI, auto (Port Mod)
EBL_F_3006.BIN: 5.7l TPI, 6-spd, alum heads (Port Mod)

RBob.
Forum: V6
11-02-2023, 07:23 AM
Replies: 10
Views: 763
Posted By RBob

Re: Smog Pump Delete vs Performance

And....

RBob.
Forum: V6
10-28-2023, 04:45 PM
Replies: 10
Views: 763
Posted By RBob

Re: Smog Pump Delete vs Performance

Absolutely no guarantee on the belt length: K060915

Can do a rudimentary measurement with a piece of rope.

Routing:
...
Forum: DFI and ECM
10-24-2023, 04:51 PM
Replies: 2
Views: 410
Posted By RBob

Re: Ebl flash 2

There are several included on the CD. The CD will also open an install dialog that will put them on your laptop.

RBob.
Forum: DIY PROM
10-16-2023, 01:49 PM
Replies: 5,154
Views: 633,548
Posted By RBob

Re: Tuning with the EBL

Common issue, there is a lean area in the VE table, which causes the RPM to surge upward.

Do a playback with the speed turned all the way to slow. watch the WB O2 go rich/lean. Also grab the RPM &...
Forum: DIY PROM
10-16-2023, 01:46 PM
Replies: 5,154
Views: 633,548
Posted By RBob

Re: Tuning with the EBL

Need to use the EBL P4 WUD, the logs differ between the EBL systems.

RBob.
Forum: Electronics
10-16-2023, 09:20 AM
Replies: 13
Views: 1,090
Posted By RBob

Re: high mount brake light issues

Cruise control, brake input to CC module.

RBob.
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