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Search: Posts Made By: RFmaster
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Forum: TBI
02-17-2017, 01:40 AM
Replies: 17
Views: 1,916
Posted By RFmaster

Re: 1992 350 tbi

Babcotyl

Cranking compression within 10 PSI is normal. 160 PSI for stock 350 is reasonable.

I would check and make sure that base timing is set correctly.
For stock LO5 it is 0 deg with EST...
Forum: TBI
10-17-2016, 10:15 AM
Replies: 42
Views: 2,832
Posted By RFmaster

Re: rich exhaust code, lean pops

ownor

DRP signal is at Pin 'C' at the distributor 4 circuit plug. Typically it is a purple-white color wire, but wire colors may have been changed. At ECM back-probe Pin B5.

Make sure that you...
Forum: TBI
10-14-2016, 10:08 AM
Replies: 42
Views: 2,832
Posted By RFmaster

Re: rich exhaust code, lean pops

ownor

ICM - ignition control module (8 pin) performs a dual function. As rotor in the distributor turns reluctor coil produces a zero crossing AC voltage waveform. ICM takes that waveform and...
Forum: TBI
10-13-2016, 04:11 PM
Replies: 42
Views: 2,832
Posted By RFmaster

Re: rich exhaust code, lean pops

Ownor

Check base timing. With EST plug open timing should be 0 to +2deg advanced. Idle speed will be low - around 575 to 625RPM. With EST plug connected and ECM controlling timing, at idle (650 to...
Forum: TBI
08-23-2016, 11:00 PM
Replies: 63
Views: 20,040
Posted By RFmaster

Re: engine stalls at stoplight

A leaky EGR could cause rough idle and stalls. It is easy enough to verify. Tougher to diagnose is a leaky intake manifold gasket where intake port sucks fumes from the lifter valley. Rare but it...
Forum: TBI
08-22-2016, 11:36 PM
Replies: 63
Views: 20,040
Posted By RFmaster

Re: engine stalls at stoplight

Well you did a rookie mistake - should have started a new thread vs. tagging at the end of the very old one! Anyhow, welcome to TGO.

Sounds like you have a car with a checkered history of...
Forum: TBI
04-01-2016, 12:35 PM
Replies: 9
Views: 6,729
Posted By RFmaster

Re: 454 TBI throttle body on 355 cui engine ??

If you have VRFPR that helps with running 80 lb injectors on top of 350 engine. It is always preferred to run a smaller injector at higher operating pressure vs. large injector at lower operating...
Forum: TBI
04-01-2016, 12:27 PM
Replies: 6
Views: 526
Posted By RFmaster

Re: 355 TBI buildup and questions...

1) PITA definition
http://www.acronymfinder.com/PITA.html

2) Does your block has provision for a roller camshaft?
Forum: TBI
03-31-2016, 11:03 PM
Replies: 9
Views: 6,729
Posted By RFmaster

Re: 454 TBI throttle body on 355 cui engine ??

You can use 454 TB with 64lb injectors installed in the fuel pod unit. IMHO 80 lb may be just too rich at idle as injector pulse width will get below 1.0 mSec - And did I mention you'll have to go to...
Forum: TBI
03-31-2016, 10:52 PM
Replies: 6
Views: 526
Posted By RFmaster

Re: 355 TBI buildup and questions...

Your camshaft (224/226 @0.05 lift .535 intake; .528 exhaust with 1:1.6 roller rockers
110 degrees lobe centerline) will result in low idle vacuum which is going to be PITA to tune. For comparison...
Forum: TBI
02-01-2016, 07:45 PM
Replies: 5
Views: 775
Posted By RFmaster

Re: possible bad injector?

Start by replacing distributor first. The 94 dizzy uses external coil and are well known to accumulate moisture. A misfire in distributor due to reluctor ring corrosion can effect both spark plugs...
Forum: TBI
01-31-2016, 07:42 PM
Replies: 1
Views: 548
Posted By RFmaster

Re: Alternator

There is additional information that you need to provide or learn how to search for parts yourself. Assuming that you have 5.0L TBI car it is ACDELCO 3342396A {#88864244} CS130; ACDelco; Amps: 100
...
Forum: TBI
01-13-2016, 11:36 PM
Replies: 3
Views: 949
Posted By RFmaster

Re: '91 RS 305 TBI: decent injector replacements?

Injectors need to be ultrasonically cleaned - carbon and fuel additive deposits are causing fuel droplets to form. Very common on high millage engines..

//RF
Forum: TBI
01-13-2016, 06:50 PM
Replies: 8
Views: 3,677
Posted By RFmaster

Re: 305 Tbi to 350 Tbi swap (need some help)

Okay - I'll try. PM if it is extensive.

//RF
Forum: TBI
01-13-2016, 10:22 AM
Replies: 8
Views: 3,677
Posted By RFmaster

Re: 305 Tbi to 350 Tbi swap (need some help)

The most common 1991 350 calibration (BCC #) for a truck with Automatic is ASDU. There are other BCC EPROMs that will work in 1227747 ECM - ASDZ is another BCC found in '91 truck applications. The...
Forum: TBI
01-13-2016, 01:08 AM
Replies: 3
Views: 949
Posted By RFmaster

Re: '91 RS 305 TBI: decent injector replacements?

The only reason you need to replace TBI injectors if they failed or if you need more fuel for higher HP applications. In most stock cases a good cleaning service all that is required besides a gasket...
Forum: TBI
01-13-2016, 01:01 AM
Replies: 8
Views: 3,677
Posted By RFmaster

Re: 305 Tbi to 350 Tbi swap (need some help)

The 93-94 350 SBC used in trucks still had flat tappet cam shaft. Block probably has all the provisions for roller cam - spider bosses are present but may not have been drilled and tapped. To drop...
Forum: TBI
12-26-2015, 11:11 AM
Replies: 2
Views: 618
Posted By RFmaster

Re: Reuse parts or buy new?

Carb - why?? Leave it in 20th century where it belongs.

Tuning EFI is simpler and results in better all around drivability. Yes, there is a learning curve and equipment upgrades. I sure do not...
Forum: TBI
12-26-2015, 10:41 AM
Replies: 6
Views: 6,195
Posted By RFmaster

Re: Throttle body Question

BBC TB

322393 (http://s226.photobucket.com/user/RFmaster89/media/TBI%20Photos/BBCIACTPS.jpg.html)


SBC

322394...
Forum: TBI
12-25-2015, 06:47 PM
Replies: 6
Views: 6,195
Posted By RFmaster

Re: Throttle body Question

Schurkley

IRC around 1990 is when GM went to a small round TPS plug in passenger cars. Before that there were two different TPS's - straight up and L shaped. Just use the right gasket and swap...
Forum: TBI
12-25-2015, 06:41 PM
Replies: 5
Views: 615
Posted By RFmaster

Re: 91 camaro passenger injector dont work

Both injectors use a common fuse for +12Volt. Instead, check the negative side of the circuit that connect injectors to the ECM. Injector circuit uses larger diameter wire (smaller AWG) - check...
Forum: TBI
12-06-2015, 05:19 PM
Replies: 4
Views: 2,643
Posted By RFmaster

Re: 1988 TBI 350 Build... tips?... advice?

'316

1) Holley TBI unit is mixed bag - some like it and some curse it. To reach 300HP power level will require fuel and air. To reach this with TBI will require 50mm bore unit and VRFPR with...
Forum: TBI
09-18-2015, 11:29 PM
Replies: 2
Views: 11,223
Posted By RFmaster

Re: TBI miss/studder from 3800-4000 RPM :doh:

If you have ruled out mechanical and fuel delivery issues this may be related to what your ECM is doing at that RPM range. Before pointing any fingers lets have the usual listing of ECM type, EPROM...
Forum: TBI
08-10-2015, 07:25 PM
Replies: 11
Views: 2,229
Posted By RFmaster

Re: Crossfire TB Boring/Bushing

Try - he does a very good job with TB's

http://www.rvmorsemachine.com/product.htm


//RF
Forum: TBI
08-09-2015, 01:45 PM
Replies: 30
Views: 42,921
Posted By RFmaster

Re: No fuel from my Injectors/ Won't start/Almost no noid light

Measure voltage with respect to ground. When engine is not running, ignition is in RUN position you'll have 12 volts present at each injector posts (relative to ground) if the injector is plugged...
Forum: TBI
07-16-2015, 10:07 AM
Replies: 4
Views: 2,958
Posted By RFmaster

Re: knock sensor for 1982 Camaro w/crossfire injection

You got slight problem - 82 F body, VIN 7 used an odd ball KS OE#1997463 which can be crossed to:

ACDelco# 218-88
AIRTEX ...
Forum: TBI
07-14-2015, 09:39 PM
Replies: 4
Views: 583
Posted By RFmaster

Re: 305 back from a carb? is it difficult

It can be done with enough time and perseverance.
Photo does not reveal what happened to the majority of harness connectors, but the main harness bundle appears to be there. ESC module is still...
Forum: TBI
07-12-2015, 01:25 PM
Replies: 5
Views: 2,469
Posted By RFmaster

Re: Firebird Crank No Start - Suspected Electrical Problem

Check EFI fuse...
Forum: TBI
06-25-2015, 10:05 PM
Replies: 20
Views: 4,038
Posted By RFmaster

Re: Thermac ?

Ron

Thermac switches have been discontinued and only a few generic later models are still available. Expect to pay top dollar!! Standard motor parts SMP has a universal replacement: STANDARD MOTOR...
Forum: TBI
06-25-2015, 10:12 AM
Replies: 20
Views: 4,038
Posted By RFmaster

Re: Thermac ?

yaj15

Took a quick look at your test results. The exhaust is showing lean condition condition by the presence of excess O2 in the exhaust stream (1.1 to 1.3%) The high HC numbers indicate misfire...
Forum: TBI
06-05-2015, 07:00 PM
Replies: 1
Views: 3,713
Posted By RFmaster

Re: ECM not recieving signal from Distributor indicating the engine is turning. No f

Check and clean bottom surface of the ICM. Make sure that distributor mounting flange is also clean. Do not use too much thermal compound (white or clear looking compound) when installing ICM into...
Forum: TBI
04-18-2015, 11:48 AM
Replies: 590
Views: 62,563
Posted By RFmaster

Re: LO3 To L30 Vortec Swap: Completed(Mostly)

Let me start with a simple fact that L30/L31 motors are truck motors which were never installed in the US spec passenger cars. Depending on your local smog regulations the L30/31 swap may or may not...
Forum: TBI
03-09-2015, 11:22 PM
Replies: 5
Views: 615
Posted By RFmaster

Re: CC Carb to TBI

Existing CCC distributor will work with TBI ECM. You will need to change plug on TBI harness to mate into standard 4-pin weather pack flat plug used in CCC dizy. Swap is not that difficult - just...
Forum: TBI
02-12-2015, 10:18 PM
Replies: 24
Views: 1,448
Posted By RFmaster

Re: Vortec 350 zz4 ebl help!!!!!

Yes, that will disable EGR. You also need to disable CCP purging solenoid and Lean Highway cruise until you get your baseline tune dialed in. All of this is covered in tuning pages on Dynamic EFI...
Forum: TBI
02-12-2015, 09:53 PM
Replies: 24
Views: 1,448
Posted By RFmaster

Re: Vortec 350 zz4 ebl help!!!!!

1) Which version of TP do you have?
2) You need XDF definition file from Rbob distribution disk in a working directory for TP.
3) TunerPRo is NOT used to upload bin files from your PC to EBL board....
Forum: TBI
01-03-2015, 05:19 PM
Replies: 4
Views: 1,365
Posted By RFmaster

Re: Dribbling Injectors

Some dribling during cranking is normal - I suspect that your fuel pump is not delivering enough fuel pressure. Do a fuel pressure check first.

//RF
Forum: TBI
01-03-2015, 05:15 PM
Replies: 10
Views: 1,835
Posted By RFmaster

Re: what to do, tbi or carb

Go with TBI - it is easy swap and long term drvivability will be better. Depending on the area that you live in swapping in carb is illegal. It is a big no-no in Kalifornia.

You'll need to pull...
Forum: TBI
01-03-2015, 02:22 PM
Replies: 5
Views: 1,336
Posted By RFmaster

Re: 350 TBI rebuild advice

'93 burban engine may have block which has provisions for a roller camshaft. Casting numbers may provide a hint, but to be certain you'll have to pull intake and inspect inner valley. If it is a...
Forum: TBI
01-01-2015, 01:13 PM
Replies: 5
Views: 1,336
Posted By RFmaster

Re: 350 TBI rebuild advice

Further to Fast355 recommendations and if you are stuck with flat tappet block there is an improved version of MTC-1 aka CS-1014R, summit SUM-1102

CS-1014R (SUM-1102)
Chevy 262-400 cid Hydraulic...
Forum: TBI
12-26-2014, 09:35 PM
Replies: 13
Views: 1,959
Posted By RFmaster

Re: TBI extra injector drivers?

Fast

I looked at Vortec intake couple years ago for a possible 2x2 TBI setup. The bottom portion of Vortec intake does not offer too much plenum volume - it is not a bath tub shape like CF...
Forum: TBI
12-19-2014, 09:01 PM
Replies: 5
Views: 1,486
Posted By RFmaster

Re: code 44 lean exhaust indicated ?

Code 44 may indicate dying or cold O2 sensor - get a scan tool or WinALDL to see if your O2 voltage swings once engine enters close loop CL. A good O2 sensor should show rich condition during cold...
Forum: TBI
11-29-2014, 09:03 PM
Replies: 14
Views: 4,174
Posted By RFmaster

Re: 1991 Camaro rs wont start

Start with basic checks:

1) Do you get +12volts at the coil during cranking?
2) Make sure that 2 wire harness between ICM and coil is in good shape and plugged correctly.
3) Check ICM - some...
Forum: TBI
11-23-2014, 09:47 AM
Replies: 5
Views: 701
Posted By RFmaster

Re: 305tbi need help

0.45 to 0.55 volts is not a switching voltage how GM has intended. In a close loop (CL) operation ECM varies fuel delivery so that the O2 voltage oscillates between rich and lean states. Rich => 0.8...
Forum: TBI
11-20-2014, 05:51 PM
Replies: 4
Views: 812
Posted By RFmaster

Re: Intake manifold bolts

Intake manifold bolts should a combination of standard SAE grade bolts and studs. Size 3/8"-16 x 1-1/4" Head size is 9/16" (or 12 point 14mm will work in pinch). OE GM bolts have a circle on its...
Forum: TBI
11-19-2014, 12:31 PM
Replies: 5
Views: 701
Posted By RFmaster

Re: 305tbi need help

Check your fuel pressure - fuel pump might be going out on you. BLM should stuck at 128 would indicate car running in OL. O2 voltage should vary between 0.2 to 0.8 V. If it is stuck around 0.450Volts...
Forum: TBI
11-15-2014, 10:39 PM
Replies: 9
Views: 2,466
Posted By RFmaster

Re: Has anyone converted a carb to a TBI?

Indeed - a new tank in a 30 year old car almost a mandatory requirement. Yes, I would go with a new EFI tank and sending module, fuel pump.

As to HP - this is question is subject to countless...
Forum: TBI
11-15-2014, 01:25 PM
Replies: 2
Views: 613
Posted By RFmaster

Re: Having some trouble with 305 TBI

Pull the air cleaner and observe injectors while cranking. If they are spitting fuel and engine fires and then dies you more than likely having fuel delivery issues.

You may have fuel delivery...
Forum: TBI
11-15-2014, 01:10 PM
Replies: 9
Views: 2,466
Posted By RFmaster

Re: Has anyone converted a carb to a TBI?

Well, It is a toss-up between donor vs. EFI build-up. It is not too diffiuclt - it will take time and planning.

To convert from CCC to TBI you'll need the following (these are basic highlights):
...
Forum: TBI
10-26-2014, 08:28 AM
Replies: 46
Views: 2,473
Posted By RFmaster

Re: Draining fuel tank

The density of gasoline ranges from 0.71–0.77 kg/L. Get longer section of 9mm (3/8") tubing and siphon remaining gasoline. You'll always have some left in the tank - just be ready for it!

//RF
Forum: TBI
10-19-2014, 11:25 AM
Replies: 24
Views: 61,257
Posted By RFmaster

Re: Intake options for TBI w/Vortec heads?

For vortec applications uses EDL-2912. The photo below is for Vortec heads. EDL-2912 is drilled for square bore and for model 2300 Holley carbs used in Ford applications.
...
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