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Search: Posts Made By: joe paco
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Forum: C4 Tech/Performance
12-21-2014, 11:02 AM
Replies: 15
Views: 6,199
Posted By joe paco

unless you used a fuel pressure gage you can not...

unless you used a fuel pressure gage you can not be certain what is happening. if you turn key ON, are you sure the fuel pump is running for 2 seconds? if it is, we can't be sure that pressure is up...
Forum: C4 Tech/Performance
12-20-2014, 05:28 PM
Replies: 16
Views: 2,442
Posted By joe paco

sounds like the connection to the key reader,...

sounds like the connection to the key reader, which is what you will replace with the Echler's resistor bypass. should have a small blk connector, male I think, and the female is up there somewhere.
Forum: C4 Tech/Performance
12-16-2014, 08:32 PM
Replies: 15
Views: 1,031
Posted By joe paco

I have not been under the hood lately, but last...

I have not been under the hood lately, but last time I tried to check total advance as you did, I got the same reaction, 10-12 advance. The timing was never an issue so I didn't bother explaining it....
Forum: C4 Tech/Performance
04-19-2014, 07:31 PM
Replies: 9
Views: 1,468
Posted By joe paco

I agree. They are not connected to each other, so...

I agree. They are not connected to each other, so it is nearly impossible for ALL 4 to be reading that high. First thing I'd do is see if the previous ones still read the same, which is close to the...
Forum: C4 Tech/Performance
04-18-2014, 08:00 PM
Replies: 24
Views: 3,547
Posted By joe paco

I think the ECM shuts off the injectors during...

I think the ECM shuts off the injectors during closed throttle deceleration. A popping should be a rich mixture, from my experience. I agree with GKK. The noise I heard on the video was normal.
Forum: C4 Tech/Performance
04-15-2014, 03:15 PM
Replies: 24
Views: 3,547
Posted By joe paco

You were setting base timing correctly. With EST...

You were setting base timing correctly. With EST connected, timing should advance as you increase RPM, and will also do that with EST disconnected if you advance throttle, at least my 91 does. I...
Forum: C4 Tech/Performance
04-09-2014, 07:06 PM
Replies: 6
Views: 5,065
Posted By joe paco

You have probably looked thru the "symptoms"...

You have probably looked thru the "symptoms" section of FSM. you have a "hard start" and a hesitation issue, sound like.

I don't see it as a "lack of fuel" issue. if it were too lean to takeoff...
Forum: C4 Tech/Performance
03-30-2014, 01:17 PM
Replies: 359
Views: 23,844
Posted By joe paco

Actually, a C4 is not easy to spin out of control...

Actually, a C4 is not easy to spin out of control unless it is on sand or water. Does not have the power or the gear. So, I don't believe that story, either.

I'm sure you are going to verify that...
Forum: C4 Tech/Performance
03-28-2014, 10:21 AM
Replies: 359
Views: 23,844
Posted By joe paco

I'm sure many of us are waiting for the pictures...

I'm sure many of us are waiting for the pictures and the video of the engine making lots of power! I assume the crash was not so severe as to disable the engine?

I would be asking some direct...
Forum: C4 Tech/Performance
03-27-2014, 11:33 AM
Replies: 3
Views: 1,099
Posted By joe paco

don't adjust that screw and you will be way ahead...

don't adjust that screw and you will be way ahead of the game! if it's already been adjusted, it will have to be adjusted by a procedure which I do not have at the moment.
Forum: C4 Tech/Performance
03-22-2014, 07:54 AM
Replies: 6
Views: 1,265
Posted By joe paco

sounds like the fuel pressure is bleeding off too...

sounds like the fuel pressure is bleeding off too quickly. a gage will tell you.

check/listen to see if the fuel pump is on for 2 seconds when you turn key on. but the key has to be off for 10...
Forum: C4 Tech/Performance
03-20-2014, 06:33 PM
Replies: 22
Views: 2,087
Posted By joe paco

my guess is that the fans are not coming on...

my guess is that the fans are not coming on because the gauge temp and the ecm temp are different. I don't believe the engine is getting to 230-250 in winter time. I'm not familiar with the digital...
Forum: C4 Tech/Performance
03-20-2014, 07:46 AM
Replies: 10
Views: 756
Posted By joe paco

oil pressure switch is a backup only in case FP...

oil pressure switch is a backup only in case FP relay fails. relay is not supposed to drop out. for the pump not to run after priming the rails, both the relay and the ops would have to fail.
Forum: C4 Tech/Performance
03-18-2014, 05:26 PM
Replies: 22
Views: 2,087
Posted By joe paco

temp gage sensor, if that is what you ask, is on...

temp gage sensor, if that is what you ask, is on right pass side of head, between 6-8 cylinders, one green wire on 91, maybe same for Lt1.
Forum: C4 Tech/Performance
03-18-2014, 05:11 PM
Replies: 22
Views: 2,087
Posted By joe paco

overheated in NY in winter? should not need the...

overheated in NY in winter? should not need the fans. check the coolant level first. radiator air flow blocked? not likely the t'stat.

the instinct says that it has no coolant, or the gauge is...
Forum: C4 General Discussion
03-18-2014, 05:02 PM
Replies: 14
Views: 852
Posted By joe paco

the front fender has to come out on 91. less than...

the front fender has to come out on 91. less than 6-7 screws. the btm one is 10m I think, may all be.
Forum: C4 Tech/Performance
03-18-2014, 04:11 PM
Replies: 10
Views: 934
Posted By joe paco

you can reset the idle air control, although this...

you can reset the idle air control, although this is generally to reset after it had been disconnected.

-key off, depress accelerator slightly, above idle, 1200 or so
- start and run for 5...
Forum: C4 Tech/Performance
03-17-2014, 08:44 AM
Replies: 11
Views: 2,294
Posted By joe paco

you will eventually have to verify a strong spark...

you will eventually have to verify a strong spark -even tho' the engine fires. it has to fire under normal cylinder pressures. remove dist cap and verify no moisture, dust, etc.

if it has been...
Forum: C4 Tech/Performance
03-14-2014, 11:16 AM
Replies: 4
Views: 1,005
Posted By joe paco

follow the link that Cliff sent. I would not...

follow the link that Cliff sent. I would not recommend taking the throttle body apart, but would clean it. I would use small pins in the TPS wires.

also, you may have a number of things that are...
Forum: C4 Tech/Performance
03-13-2014, 08:30 AM
Replies: 23
Views: 2,315
Posted By joe paco

yep, good advice. the dist won't drop because the...

yep, good advice. the dist won't drop because the tab that drives the gear is riding on top of the oil pump drive shaft.

FIRST thing is to set mark on balancer to 0 with #1 on compression. then...
Forum: C4 Tech/Performance
03-12-2014, 08:47 AM
Replies: 45
Views: 3,086
Posted By joe paco

Chris, save that gas for your Toyota! :lol: ...

Chris, save that gas for your Toyota! :lol:

when I can explain how gas goes bad overnight, I will believe. but some sensors seem to go bad at any time. far as I know, the l98 needs inputs from MAF...
Forum: C4 Tech/Performance
03-12-2014, 08:26 AM
Replies: 23
Views: 2,315
Posted By joe paco

yep, I agree. you cannot set timing accurately...

yep, I agree. you cannot set timing accurately before running the engine. and you don't need to because you use the light to set it.

if it sputters it is retarded, so turn it counterclockwise...
Forum: C4 Tech/Performance
03-11-2014, 07:09 PM
Replies: 45
Views: 3,086
Posted By joe paco

mine has the MAP, IAT -intake/manifold ambient...

mine has the MAP, IAT -intake/manifold ambient temp. I assume yours has one or the other and the idea is the same -unplug one and see reaction, then the other. nothing to lose.

I would be very...
Forum: C4 Tech/Performance
03-11-2014, 05:57 PM
Replies: 45
Views: 3,086
Posted By joe paco

if the key chip was part of this problem you...

if the key chip was part of this problem you would not be cranking and would have no injector pulse.

if you have a signal on the meter or test light, blinking, the circuit is not "shut off." you...
Forum: C4 Tech/Performance
03-11-2014, 09:14 AM
Replies: 21
Views: 3,644
Posted By joe paco

I think the meter would explain the wide variance...

I think the meter would explain the wide variance -maybe it was made in Panama! ja ja ja-_ but, the gear does not engage every time, meaning low current OR faulty solenoid or bad ground on starter...
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